Mar. 2017, 日本鉄鋼協会, 学術記念賞（西山記念賞）　　　　　　　　　　　　　　　
微小電気学的手法による鉄鋼材料の腐食の研究
坂入 正敏

Jan. 2017, 北海道大学, 教育総長賞（奨励賞）　　　　　　　　　　　　　　　
坂入 正敏

May 1991, 腐食防食協会進歩賞　　　　　　　　　　　　　　　
Japan

Influence of Zn²⁺ on Corrosion Behavior of Ti in H₂SO₄ Solution with F⁻
Xinxin LIU, Yoganandan GOVINDARAJ, Masatoshi SAKAIRI
Electrochemistry, 93, 3, 037010, 037010, The Electrochemical Society of Japan, 29 Mar. 2025, [Peer-reviewed], [Last author]
English, Scientific journal

Alkaline ethanolamine as dual-functional agent: Effective CO2 capture agent and corrosion inhibitor for structural applications
Govindaraj Yoganandan, Ryosuke Saito, Keiichi Yano, Masatoshi Sakairi, Koji Fushimi, Ryoma Kitagaki, Yogarajah Elakneswaran, Hisanori Senboku, Yuya Yoda, Masato Tsu-jino, Akira Nishida
Chemical Engineering Journal, 504, 158810, 158810, Elsevier BV, Jan. 2025
Scientific journal

Enhancing CO2 capture in cement-based materials with alkanolamines: A comprehensive study on efficiency, phase-specific impact, and carbonation mechanisms
Kirushnapillai Kopitha, Yogarajah Elakneswaran, Ryoma Kitagaki, Ryosuke Saito, Keiichi Yano, Yuya Yoda, Masato Tsujino, Akira Nishida, Hisanori Senboku, Koji Fushimi, Masatoshi Sakairi
Science of The Total Environment, 957, 177463, 177463, Elsevier BV, Dec. 2024, [Peer-reviewed], [Last author]
English, Scientific journal

Identification of Rusts Formed on Steels by Image Analysis with HSV Color Space
Hiroo Ishii, Masatoshi Sakairi
Tetsu-to-Hagane, 110, 15, 1216, 1224, Iron and Steel Institute of Japan, 15 Nov. 2024, [Peer-reviewed], [Last author]
Japanese, Scientific journal

Year-round Monitoring of Temperature and Humidity using a Sensor Network installed in the Hokkaido Centennial Memorial Tower
Kazuhisa Azumi, Masatoshi Sakairi, Koji Fushimi, Takashi Sato, Ken Mikami, Masazumi Miura
Tetsu-to-Hagane, 110, 11, 1203, 1215, Nov. 2024, [Peer-reviewed]
Japanese, Scientific journal

Comparison of the corrosion behaviour of 10Cr and 17Cr Al added ODS steel in simulated reprocessing nitric acid medium
Shakthi Balan D, R. Priya, C. Thinaharan, M. Sakairi, S. Ukai, S. Ningshen
Journal of Nuclear Materials, 599, 155258, 155258, Elsevier BV, Oct. 2024, [Peer-reviewed]
English, Scientific journal

Effect of substrate temperature and electrolyte composition on the fabrication of through-hole porous AAO membrane with SF-MDC
Adane Adugna Ayalew, Xiaole Han, Masatoshi Sakairi
Materials Chemistry and Physics, 323, 129658, 129658, Elsevier BV, Sep. 2024, [Last author]
English, Scientific journal

Metal-Fluoride Complex Stability Constant in Acid Solution as an Indicator to Identify the Corrosion Behavior of Metal Cations on Titanium
Xinxin Liu, Yoganandan Govindaraj, Masatoshi Sakairi
Corrosion, 80, 10, 1024, 1032, Association for Materials Protection and Performance (AMPP), 28 Aug. 2024, [Peer-reviewed], [Last author]
English, Scientific journal, The Ti was immersed in 0.058 mol/L NaF containing 1.68 mol/L H2SO4 solution with different metal cations (Ca2+, Cu2+, Fe2+, Mg2+, Mn2+, Ni2+, Zn2+, Al3+, and Fe3+) for 7 d to identify the role of metal cations on corrosion behavior of titanium. To elucidate the role of metal cations on the corrosion behavior of Ti in acid solution, the standard electrode potential, E0, hardness of metal cations, X, and metal-fluoride complex stability constant, Kn, were chosen as the potential indicator. It is found that the mass loss fraction obtained from the immersion tests as a function of the metal-fluoride complex stability constant, Kn, has the highest correlation coefficient (0.92). The metal cations (Al3+ and Fe3+) with higher stability constant of the metal-fluoride complex in acid solution, (Kn > 3.27), show corrosion inhibition effect on Ti in acid solution. The Kn could be a suitable indicator to understand the role of metal cations on the Ti corrosion mechanism.

Formation of Through-Hole Porous Anodic Aluminum Oxide Layer Locally with 3D Printed Solution Flow Type Microdroplet Cell
Adane Adugna Ayalew, Xiaole Han, Yoganandan Govindaraj, Masatoshi Sakairi
Journal of The Electrochemical Society, 171, 8, 083505, 083505, The Electrochemical Society, 01 Aug. 2024, [Peer-reviewed], [Last author]
English, Scientific journal, In this study, a 3D-prinited solution-flow type microdroplet cell (SF-MDC) is employed as a new technique for the fabrication of porous anodic aluminum oxide (AAO) layer using oxalic acid electrolyte on aluminum. The surface morphology of the porous AAO film was characterized by a scanning electron microscope. The aim of this study was to fabricate a through-hole porous alumina layer in a single step anodizing process and to investigate the influence of anodized voltages and scanning speeds on the thickness and pore structure of alumina layer. The results showed that the pore diameter and interpore distance were directly proportional to the anodizing voltage. The thicknesses of formed AAO films were found to be 35.5, 50.7, and 81.6 μm at scanning speeds of 10, 5, and 2.5 μms⁻¹, respectively. Through-hole porous AAO was successfully fabricated at room temperature without chemical etching. The SF-MDC fabrication technique is proposed as an environmentally attractive and suitable process for the fabrication of porous AAO layers.

Ion-selectivity of galvanic corrosion products formed in multi-material gaps under atmospheric corrosion conditions with anti-freezing salts
Kosaku Nomura, Masatoshi Sakairi, Koji Fushimi
Corrosion Science, Aug. 2024
Scientific journal

Role of hygroscopic chloride salts on corrosion performance and hydrogen absorption of steel under cyclic wet-dry conditions
Xiaole Han, Masatoshi Sakairi
Corrosion Science, 231, 111993, 111993, Elsevier BV, May 2024, [Peer-reviewed], [Last author]
English, Scientific journal

Characteristic variations in a pulsed‐anodized NiTi alloy surface by the lower voltage setting
Ryota Kawakami, Yuya Matsui, Akihiro Tsuruta, Masatoshi Sakairi, Naofumi Ohtsu
Surface and Interface Analysis, 56, 8, 573, 579, Wiley, 27 Apr. 2024, [Peer-reviewed]
English, Scientific journal, Pulsed anodization of a nearly equiatomic NiTi alloy in HNO₃ leads to the formation of a nearly Ni‐free oxide layer, resulting in the suppression of Ni‐ion release from the alloy surface. The core technology involves introduction of a lower‐voltage period, which promostes chemical reactions between the alloy and electrolyte, to obtain a surface layer with better corrosion protection. In this study, a higher voltage of 3.5 V was applied, and the lower voltage was varied within 0–3.5 V. As the lower voltage was increased, nanometer‐sized pores present on the anodized surface gradually expanded, while the layer thickness decreased. Although the corrosion protectivity of the layer did not change significantly during the electrochemical experiments, the amount of Ni‐ion released into the physiological solution significantly decreased when the voltage was below 1.8 V. X‐ray photoelectron spectroscopy analyses revealed the presence of Ni (OH)₂ on the topmost surface, and its concentration decreased at a voltage <1.8 V. Lower voltages affected the concentration of Ni (OH)₂ on the topmost surface and thus considerably influenced the Ni‐ion release behavior. These findings will contribute to the production of NiTi alloys with improved biocompatibility.

Effect of Snow Depth on the Hydrogen Content of Steels in Snowy Environment
Junichiro Kinugasa, Masatoshi Sakairi
Zairyo-to-Kankyo, 73, 4, 97, 101, Japan Society of Corrosion Engineering, 10 Apr. 2024, [Peer-reviewed], [Last author]
Japanese, Scientific journal

Corrosion Study of Aluminum 7075 Alloy in Cationic Aqueous Medium by Surface Analysis
Md. Saiful Islam, Masatoshi Sakairi, Akira Kaneko, Md. Shakhawat Hossain
MATERIALS TRANSACTIONS, 65, 4, 389, 397, Japan Institute of Metals, 01 Apr. 2024, [Peer-reviewed]
English, Scientific journal

Smart release of turmeric as a potential corrosion inhibitor from a pH-responsive polymer encapsulated highly ordered mesoporous silica containers
Durgambika Venkatachalam, Yoganandan Govindaraj, Manoj Prabhakar, Arulkumar Ganapathi, Masatoshi Sakairi, Michael Rohwerder, Lakshman Neelakantan
Surfaces and Interfaces, 45, 103883, 103883, Elsevier BV, Feb. 2024, [Peer-reviewed]
English, Scientific journal

Fabrication of Ni-microstructure through electrochemical deposition using 3D printed solution flow type microdroplet cell
Adane Adugna Ayalew, Xiaole Han, Keita Suzuki, Suzuka Yoshida, Masatoshi Sakairi
Materials Today Communications, 37, 107069, 107069, Elsevier BV, Dec. 2023, [Last author]
English, Scientific journal

A critical review of additive material manufacturing through electrochemical deposition techniques
Adane Adugna Ayalew, Xiaole Han, Masatoshi Sakairi
Additive Manufacturing, 77, 103796, 103796, Elsevier BV, Sep. 2023, [Peer-reviewed], [Last author]
English, Scientific journal

The promotion effect of aluminium ion on hydrogen entry into steel during atmospheric corrosion
Xiaole Han, Masatoshi Sakairi
Electrochimica Acta, 458, 142505, 142505, Elsevier BV, Aug. 2023, [Peer-reviewed], [Corresponding author]
Scientific journal

Elucidation of electrochemical and morphological difference of carbon steel corroded in aqueous chloride solutions at low temperatures
Tong Shen, Masatoshi Sakairi
Electrochimica Acta, 450, 142220, 142220, Elsevier BV, May 2023, [Peer-reviewed], [Corresponding author]
Scientific journal

Miniature pH detection probe for in-situ monitoring of cement paste inside
Koji Fushimi, Tomoya Takano, Yoganandan Govindaraj, Ryosuke Saito, Masatoshi Sakairi
Electrochimica Acta, 441, 141776, 141776, Elsevier BV, Feb. 2023
Scientific journal

INHIBITION PROFICIENCY OF Al3+ ON MILD STEEL CORROSION IN DIFFERENT pH AQUEOUS MEDIUM　　　　　　　　　　　　　　　
Md. Saiful Islam, Masatoshi Sakairi
Materials & Corrosion Engineering Management, 4, 1, 20, 28, Jan. 2023, [Peer-reviewed], [Last author]
English, Scientific journal

油性環境の凝縮水中でMo含有ステンレス鋼に形成される皮膜の解析　　　　　　　　　　　　　　　
加藤雅貴, 坂入正敏
材料と環境, 2023, [Peer-reviewed], [Last author]
Scientific journal

Passivity of iron surface in curing cement paste environment investigated by electrochemical impedance spectroscopy and surface characterization techniques
Sourav Kr. Saha, Tomoya Takano, Koji Fushimi, Masatoshi Sakairi, Ryosuke Saito
Surface and Interface, 36, 102549, 2023, [Peer-reviewed]
English, Scientific journal

積雪環境下における鋼材の埋雪深さが腐食挙動に与える影響の評価　　　　　　　　　　　　　　　
衣笠潤一郞, 坂入正敏
材料と環境, 72, 1, 9, Jan. 2023, [Peer-reviewed], [Last author]
Japanese, Scientific journal

Influence of Metal Cations on Corrosion Behavior of Aluminum Alloy 2024-T3 in Model Freshwater　　　　　　　　　　　　　　　
Li Li, Masatoshi Sakairi, Md. Saiful Islam, Akira Kaneko
Materials Trans action, 64, 540, 548, 2023, [Peer-reviewed]
English, Scientific journal

Influence of Fe³⁺ on titanium corrosion in H₂SO₄ solutions without and with F⁻
Xin Xin Liu, Masatoshi Sakairi, Qiang Qiang Liao
Corrosion Reviews, 41, 1, 73, 83, Walter de Gruyter GmbH, 09 Dec. 2022
Scientific journal, Abstract

Influence of Fe³⁺ on the corrosion of titanium in H₂SO₄ solution without F⁻ and with F⁻ was investigated by electrochemical tests. The electrochemical test results showed that Fe³⁺ could significantly inhibit titanium corrosion in H₂SO₄ solution without F⁻ and with F⁻ by promoting the protective film formation on titanium. Titanium corrosion resistance (R_c) was positively related to the concentration of Fe³⁺ in H₂SO₄ without and with F⁻. A mechanism was proposed for Fe³⁺ inhibiting the corrosion of titanium in H₂SO₄ solution without and with F⁻.

Gravimetric corrosion tests and surface analysis of SUS 310S in model seawater　　　　　　　　　　　　　　　
Md. Saiful Islama, Most. Sabina Yasminc, Masatoshi Sakairi
Journal of Materials Science Research and Reviews, 9, 1, 22, 30, Sep. 2022, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal

薄い液膜下における鋼の腐食に及ぼす腐食抑制剤の影響　　　　　　　　　　　　　　　
門馬悠一郎, 坂入正敏, 大谷恭平, 上野義文
材料と環境, 71, 133, 137, May 2022
Japanese, Scientific journal

膜厚制御された液膜下における炭素鋼の電気化学挙動　　　　　　　　　　　　　　　
門馬悠一郎, 坂入正敏, 大谷恭平, 上野義文
材料と環境, 71, 4, 121, 125, Apr. 2022, [Peer-reviewed]
Japanese, Scientific journal

Effects of metal cations on corrosion morphology of carbon steel in model fresh water　　　　　　　　　　　　　　　
Li Li, M. Sakairi
Zairyo-to-Kankyo, 71, 208, 212, 2022, [Peer-reviewed], [Last author]
English, Scientific journal

炭素鋼の腐食におよぼすイミダゾリン系腐食インヒビターの影響　　　　　　　　　　　　　　　
野口息吹, 坂入正敏, 水上裕貴, 砂場敏行
材料と環境, 71, 176, 179, 2022, [Peer-reviewed]
Japanese, Scientific journal

炭素鋼およびアルミニウム合金の電気化学挙動に及ぼす溶液温度の影響　　　　　　　　　　　　　　　
沈 童, 坂入正敏
材料と環境, 71, 133, 137, 2022, [Peer-reviewed], [Last author]
Japanese, Scientific journal

Corrosion behavior of A6061 aluminum alloy in cation containing aqueous medium　　　　　　　　　　　　　　　
Md.Sairufl Islam, M. Sakair
Corrosion Communications, 5, 39, 48, 2022, [Peer-reviewed], [Last author], ［Internationally co-authored］, [International Magazine]
English, Scientific journal

金属上に形成した水膜中の酸素拡散挙動に及ぼす水膜厚さと温度差の影響　　　　　　　　　　　　　　　
坂入正敏, 谷口雅也
鉄と鋼, 107, 12, 1029, 1035, Dec. 2021, [Peer-reviewed], [Lead author]
Japanese, Scientific journal

環境因子を考慮した炭素鋼の大気腐食モデリングとシミュレーション　　　　　　　　　　　　　　　
五十嵐誉廣, 小松篤史, 加藤千明, 坂入正敏
鉄と鋼, 107, 12, Dec. 2021, [Peer-reviewed]
Japanese, Scientific journal

模擬淡水における炭素鋼の腐食挙動に及ぼす金属カチオンの影響　　　　　　　　　　　　　　　
李礼, 坂入正敏
鉄と鋼, 107, 12, Dec. 2021, [Peer-reviewed]
Japanese, Scientific journal

Synergistic Effects of Metal Cations and Sodium Gluconate on the Inhibition of Freshwater Corrosion of Mild Stee
K. Otani, M. Sakairi
Materials Transactions, 62, 6, 815, 820, Japan Institute of Metals, Jun. 2021, [Peer-reviewed]
English, Scientific journal

Hydrogen permeation behavior of steel under wet/dry corrosion with changes in relative humidity at the dry　　　　　　　　　　　　　　　
X. Han, M. Sakairi
ISIJ International, 61, 4, 1192, 1198, Apr. 2021, [Peer-reviewed]
English, Scientific journal

Hydrogen permeation behavior of scratch formed on Zn coated steels in simulated atmospheric corrosion environment　　　　　　　　　　　　　　　
K. Sakata, M. Sakairi, J. Kinugasa
ISIJ International, 61, 4, 1118, 1124, Apr. 2021, [Peer-reviewed]
English

Hydrogen permeation behavior of scratch on Zn coated steel during 1000 hours wet and dry corrosion test　　　　　　　　　　　　　　　
K. Sakata, M. Sakairi, J. Kinugasa
ISIJ International, 61, 4, 1125, 1132, Apr. 2021, [Peer-reviewed]
English, Scientific journal

Effect of scratch size on hydrogen permeation behavior of zinc coated steel during wet and dry corrosion tests　　　　　　　　　　　　　　　
M. Sakairi, T. Hashimoto
ISIJ International, 61, 4, 1097, 1101, Apr. 2021, [Peer-reviewed], [Lead author]
English, Scientific journal

Hydrogen Absorption Mechanism into Iron in Aqueous Solution including Metal Cations by Laser Ablation Tests and First-principles Calculations
T. Igarashi, K. Otani, C. Kato, Y. Togashi, M. Sakairi, K. Baba, S. Takagi
ISIJ International, 61, 4, 1085, 1090, Iron and Steel Institute of Japan, Apr. 2021, [Peer-reviewed]
Scientific journal

Electrochemical Studies on the Corrosion Behavior of Mild Steel in NaCl Aqueous Solutions with Zinc Ions　　　　　　　　　　　　　　　
Md. Islam Saiful, Masatoshi Sakairi
Journal of Materials Science Research and Reviews, 7, 2, 152120, 13, Feb. 2021, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
Scientific journal

Local Electrochemical Measurements by 3D Printed Sf-MDC Equipped with Optical Microscope　　　　　　　　　　　　　　　
K. Sakata, M. Bilal, M. Sakairi, T. Murata
Journal of the electrochemical society, 168, 061505, 2021, [Peer-reviewed]
English, Scientific journal

High throughput electrochemically driven metal microprinting with multicapillary droplet cell　　　　　　　　　　　　　　　
M. Bilal, M. Sakairi
Materials Today Communications, 26, 102053, 2021, [Peer-reviewed], [International Magazine]
English, Scientific journal

Carbon nanohorn coating by electrodeposition accelerate bone formation on titanium implant
Sari Takada, Eri Hirata, Masatoshi Sakairi, Eijiro Miyako, Yuta Takano, Natsumi Ushijima, Masako Yudasaka, Sumio Iijima, Atsuro Yokoyama
Artificial Cells, Nanomedicine, and Biotechnology, 49, 1, 20, 29, Informa UK Limited, 01 Jan. 2021, [Peer-reviewed], [International Magazine]
English, Scientific journal, Direct contact between bone and implant materials is required for dental implants. Titanium is used for the implant material owing to its mechanical and biological properties. The anodisation as the surface treatment was employed to enhance osteogenesis around titanium. Moreover, carbon nanohorn (CNH), a type of nanometer-sized carbon material, was reported to promote the bone formation. Thus, it is expected that if the surface of anodised Ti (AnTi) is modified with CNHs, Ti-bone contact would be enhanced. In this study, the Ti surface was modified with CNHs by electrophoresis and obtained anodised titanium coated with CNHs (CNH/AnTi). In vitro, CNH/AnTi attracted osteoblastic cells more than AnTi, thereby the proliferation of osteoblastic cell was enhanced by CNH/AnTi more than by AnTi. In vivo, at 7 and 28 days after implantation of CNH/AnTi or AnTi into the rat femur, more aggressive bone formation was observed on the surface of CNH/AnTi than on AnTi. More importantly, the area where newly formed bone tissue directly attached to CNH/AnTi was significantly larger than that for AnTi, suggesting that "contact osteogenesis" was accelerated on CNH/AnTi during the early post-implantation period. CNH/AnTi would be advantageous especially for the early stages of bone regeneration after surgery.

Corrosion behaviour of Al-containing high Cr ferritic oxide dispersion strengthened steel in nitric acid environment
R. Priya, S. Ningshen, M. Sakairi, S. Ukai
Journal of Nuclear Materials, 534, 152120, 152120, Elsevier BV, Jun. 2020, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
Scientific journal

3D printed solution flow type microdroplet cell for simultaneous area selective anodizing　　　　　　　　　　　　　　　
Bilal Muhanmad, Masatoshi Sakairi
Journal of Advanced Research, 26, 11, 43, 61, 2020, [Peer-reviewed]
English, Scientific journal

Fast fabrication of localized porous alumina patterns with 3D printed microdroplet cell　　　　　　　　　　　　　　　
Bilal Muhanmad, M. Sakairi
Fast fabrication of localized porous alumina patterns with 3D printed microdroplet cell, 167, 081501, 2020, [Peer-reviewed]
Scientific journal

Auger electron spectroscopic analysis of corrosion products formed on A3003 aluminum alloy in model fresh water with different Zn2+ concentration
Kyohei Otani, Md. Saiful Islam, Masatoshi Sakairi, Akira Kaneko
Surface and Interface Analysis, 51, 12, 1207, 1213, John Wiley and Sons Ltd, 01 Dec. 2019
English, Scientific journal

Effects of solution compositions on corrosion behavior of 13 mass% Cr martensitic stainless steels in simulated oil and gas environments　　　　　　　　　　　　　　　
M. Sakairi, H. Mizukami, S. Hashizume
AIMS Materials Sciences, 6, 288, 300, 2019, [Peer-reviewed]
English, Scientific journal

Corrosion inhibition of mild steel by metal cations in high pH simulated fresh water at different temperatures　　　　　　　　　　　　　　　
Md. Saiful Islam, M. Sakairi
Corrosion Science, 153, 100, 108, 2019, [Peer-reviewed]
English, Scientific journal

Effect of Anodizing Time on Multiscale Porous Structure of Ti-Al Alloy Microchannel Wall　　　　　　　　　　　　　　　
T. Ohmi, T. Yamamori, M. Sakairi
Materials Transaction, 60, 519, 524, 2019, [Peer-reviewed]
English, Scientific journal

Effects of Zn2+ concentration on the corrosion of mild steel in NaCl aqueous solutions　　　　　　　　　　　　　　　
Md. Saiful Islam, M. Sakairi
Journal of the electrochemical society, 166, 2, C83, C90, 2019, [Peer-reviewed]
English, Scientific journal

Auger electron spectroscopic analysis for corrosion products formed on A3003 aluminum alloy in model fresh water with different Zn2+ concentration　　　　　　　　　　　　　　　
K. Otani, Md. Saiful Islam, M. Sakairi, A. Kaneko
Surface and Interface Analysis, 1, 7, 2019, [Peer-reviewed]
English, Scientific journal

Studies on corrosion inhibition by metal cations for mild steel in simulated fresh water at high temperature　　　　　　　　　　　　　　　
Md. Saiful Islam, Kyohei Otani, Masatoshi Sakairi
Zairy-to-Kankyo, 67, 11, 457, 461, Nov. 2018, [Peer-reviewed]
English, Scientific journal

Local anodizing of aluminum with a solution flow-type micro droplet cell and fabrication of through-hole-type porous alumina　　　　　　　　　　　　　　　
T. Matsumoto, M. Sakairi
Journal of The Japan Institute of Light Metals, 68, 8, 401, 407, Aug. 2018, [Peer-reviewed]
Japanese, Scientific journal

Influence of metal cations on inhibitor performance of gluconates in the corrosion of mild steel in fresh water
Kyohei Otani, Masatoshi Sakairi, Md. Saiful Islam
Corrosion Reviews, 36, 1, 105, 113, Walter de Gruyter GmbH, 23 Feb. 2018, [Peer-reviewed]
English, Scientific journal

Corrosion-induced morphological changes and the mechanism of A3003 aluminum alloy in model sea water containing gluconates and zinc ions
Kyohei Otani, Masatoshi Sakairi, Akira Kaneko, Daisuke Nagasawa
Keikinzoku/Journal of Japan Institute of Light Metals, 68, 1, 16, 21, Japan Institute of Light Metals, 2018, [Peer-reviewed]
Japanese, Scientific journal

Role of metal cations on corrosion of metallic materials in aqueous environments　　　　　　　　　　　　　　　
M. Sakairi, K. Otani, Md. Saiful Islam
Proc. of the 9th International Symposium on Marin Corrosion and Control, 31, 32, 2018, [Invited]
English, International conference proceedings

Corrosion performance of 13%Cr martensitic stainless steels in supercritical CO2 environments　　　　　　　　　　　　　　　
Corrosion performance of, Cr martensitic stainless steels in supercritical CO, nvironments
Proc. Latincorr 2018, L2018-007, 2018, [Peer-reviewed]
English, International conference proceedings

Corrosion Inhibition of Metal Cation on Steels in Supplied Water of Boiler Environment　　　　　　　　　　　　　　　
Masatoshi Sakairi, Kazuhisa Azumi, Md. Saiful Islam
ボイラ研究, 411, 10, 10, 17, 2018, [Peer-reviewed]
Japanese, Scientific journal

Corrosion inhibition effects of metal cations on SUS304 in 0.5 M Cl− aqueous solution
Md. Saiful Islam, Kyohei Otani, Masatoshi Sakairi
Corrosion Science, 140, 8, 17, Elsevier Ltd, 2018, [Peer-reviewed]
English, Scientific journal

Role of metal cations on corrosion of coated steel substrate in model aqueous layer　　　　　　　　　　　　　　　
Md. Saiful Islam, Kyohei Otani, Masatoshi Sakairi
ISIJ International, 58, 9, 1616, 1622, 2018, [Peer-reviewed]
English, Scientific journal

Effect of metal cations on corrosion of mild steel in 10 mM Cl- aqueous solution　　　　　　　　　　　　　　　
Md. S. Islam, K.i Otani, M. Sakairi
Corrosion Science, 131, 17, 27, 2018, [Peer-reviewed]
English, Scientific journal

グルコン酸や亜鉛イオンを含む模擬海水におけるアルミニウム合金の腐食による形態変化とその機構　　　　　　　　　　　　　　　
大谷恭平, 坂入正敏, 兼子 彬, 長澤大介
軽金属, 68, 1, 1, 6, 2018, [Peer-reviewed]
Japanese, Scientific journal

温度条件によるZn板上に形成したNaCl水膜中の酸素拡散挙動変化　　　　　　　　　　　　　　　
坂入正敏, 坂木亮太
材料と環境, 66, 12, 401, 404, Dec. 2017, [Peer-reviewed]
Japanese, Scientific journal

Hydrogen Permeation Behavior Changed with Size of Scratch Formed on Zinc Coated Steels During Wet-Dry Cycle Corrosion
橋本拓海, 坂入正敏, 湯瀬文雄, 漆原 亘
材料と環境, 66, 11, 357, 360, 腐食防食学会, Nov. 2017, [Peer-reviewed]
Japanese, Scientific journal

Ti-Al 系マイクロチャンネル内壁のマルチスケールポーラス構造に及ぼす陽極酸化時間の影響　　　　　　　　　　　　　　　
大参達也, 山森 樹, 坂入正敏
軽金属, 67, 11, 589, 594, Nov. 2017, [Peer-reviewed]
Japanese, Scientific journal

Effect of anodizing time on multiscale porous structure of Ti-Al alloy microchannel wall
Tatsuya Ohmi, Tatsuki Yamamori, Masatoshi Sakairi
Keikinzoku/Journal of Japan Institute of Light Metals, 67, 11, 589, 594, Japan Institute of Light Metals, 2017, [Peer-reviewed]
Japanese, Scientific journal

Effect of Metal Cations in Fresh Water on Surface Film Structure and Initial Corrosion of Mild Steel
K. Otani, M. Sakairi
OXIDE FILMS: A SYMPOSIUM IN HONOR OF MASAHIRO SEO, 75, 27, 59, 64, 2017, [Peer-reviewed]
English, International conference proceedings

Inhibition Ability of Gluconates for Fresh Water Corrosion of Mild Steel Enhanced by Metal Cations
Kyohei Otani, Md. Saiful Islam, Masatoshi Sakairi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 164, 9, C498, C504, 2017, [Peer-reviewed]
English, Scientific journal

Effects of metal cations on corrosion of mild steel in model fresh water
Kyohei Otani, Masatoshi Sakairi
CORROSION SCIENCE, 111, 302, 312, Oct. 2016, [Peer-reviewed]
English, Scientific journal

Formation of layered structure porous-type anodic alumina films locally with a solution flow-type micro-droplet cell
Masatoshi Sakairi, Fumika Nishino, Regina Itzinger
SURFACE AND INTERFACE ANALYSIS, 48, 8, 928, 932, Aug. 2016, [Peer-reviewed]
English, Scientific journal

Formation of oxide films for high-capacitance aluminum electrolytic capacitor by liquid-phase deposition and anodizing
Masatoshi Sakairi, Ryota Fujita, Shinji Nagata
SURFACE AND INTERFACE ANALYSIS, 48, 8, 906, 912, Aug. 2016, [Peer-reviewed]
English, Scientific journal

Effect of surface conditions and specimen composition on hydrogen permeation behavior of coated and uncoated steels during wet and dry corrosion at a constant dew point　　　　　　　　　　　　　　　
K. Igarashi, M. Sakairi
ISIJ International, 57, 466, 472, Mar. 2016, [Peer-reviewed]
English, Scientific journal

Effect of Surface Conditions and Specimen Composition on Hydrogen Permeation Behavior of Coated and Uncoated Steels during Wet and Dry Corrosion at a Constant Dew Point
Koya Igarashi, Masatoshi Sakairi
ISIJ INTERNATIONAL, 56, 3, 465, 471, 2016, [Peer-reviewed]
English, Scientific journal

Effect of a Kind of Metal Cation on Corrosion Mechanism of A3003 Aluminum Alloy in Tap Water
Kyohei Otani, Masatoshi Sakairi, Akira Kaneko
MATERIALS TRANSACTIONS, 57, 9, 1539, 1546, 2016, [Peer-reviewed]
English, Scientific journal

hanges in oxide film structure of aluminum alloy by incorporation of cations in tap water　　　　　　　　　　　　　　　
K. Otani, M. Sakairi, A. Kaneko
Material Transaction, 57, 1539, 1546, 2016, [Peer-reviewed]
English, Scientific journal

Improvement of Corrosion Resistance of Aluminum Alloy with Wettability Controlled Porous Oxide Films　　　　　　　　　　　　　　　
M. Sakairi, V. Goyal
Corrosion Science and Technology, 15, 166, 170, 2016, [Peer-reviewed]
English, Scientific journal

Development of an Area-selective Technique for Electrochemical Hydrogen Detection with Laser Local Activation
Masatoshi Sakairi, Koya Igarashi, Akihide Nagao
ISIJ INTERNATIONAL, 56, 3, 483, 486, 2016, [Peer-reviewed]
English, Scientific journal

Effect of Surface Conditions and Relative Humidity on Hydrogen Permeation Behavior of Zinc Coated Steels during Wet and Dry Corrosion
Masatoshi Sakairi, Shogo Takagi
ISIJ INTERNATIONAL, 56, 3, 452, 458, 2016, [Peer-reviewed]
English, Scientific journal

Corrosion degradation of AISI type 304L stainless steel for application in nuclear reprocessing plant
S. Ningshen, M. Sakairi
JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 19, 12, 3533, 3542, Dec. 2015, [Peer-reviewed]
English, Scientific journal

Corrosion performance and surface analysis of Ti-Ni-Pd-Ru-Cr alloy in nitric acid solution
S. Ningshen, M. Sakairi, K. Suzuki, T. Okuno
CORROSION SCIENCE, 91, 120, 128, Feb. 2015, [Peer-reviewed]
English, Scientific journal

Surface analysis of passive films formed on Aluminum alloys in different metal cation containing solutions　　　　　　　　　　　　　　　
M. Sakairi, R. Sasaki, K. Otani, K. Suzuki, A. Kaneko
European Corrosion Congress, EUROCORR 2015, 3, 1527, 1530, Austrian Society for Metallurgy and Materials (ASMET), 2015
English, International conference proceedings

Evaluation of metal cation effects on galvanic corrosion behavior of the A5052 aluminum alloy in low chloride ion containing solutions by electrochemical noise impedance
M. Sakairi, R. Sasaki, A. Kaneko, Y. Seki, D. Nagasawa
ELECTROCHIMICA ACTA, 131, 123, 129, Jun. 2014, [Peer-reviewed]
English, Scientific journal

The surface characterization and corrosion resistance of 11 % Cr ferritic/martensitic and 9-15 % Cr ODS steels for nuclear fuel reprocessing application
S. Ningshen, M. Sakairi, K. Suzuki, S. Ukai
JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 18, 2, 411, 425, Feb. 2014, [Peer-reviewed]
English, Scientific journal

The effects of film thickness and incorporated anions on pitting corrosion of aluminum with barrier-type oxide films formed in neutral borate and phosphate electrolytes
Hiroki Habazaki, Rokuro Nishimura, Kenji Okitsu, Hiroyuki Inoue, Ikuo Kiriyama, Fumitaka Kataoka, Masatoshi Sakairi, Hideaki Takahashi
JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 18, 2, 369, 376, Feb. 2014, [Peer-reviewed]
English, Scientific journal

Effect of metal cations on corrosion behavior and surface film structure of the A3003 aluminum alloy in model tap waters
K. Otani, M. Sakairi, R. Sasaki, A. Kaneko, Y. Seki, D. Nagasawa
JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 18, 2, 325, 332, Feb. 2014, [Peer-reviewed]
English, Scientific journal

Electrochemical Noise Evaluation of Metal Cation Effects on Galvanic Corrosion of Aluminum Alloys in Low Concentration of Chloride Ion Containing Solutions
M. Sakairi, K. Otani, R. Sasaki
STRUCTURAL INTEGRITY, 86, 589, 596, 2014, [Peer-reviewed]
English, International conference proceedings

被覆した白金線対極を用いる溶液フロー型微小液滴セルによるアルミニウムの局部陽極酸化　　　　　　　　　　　　　　　
山口智也, 坂入正敏
表面技術, 65, 385, 390, 2014, [Peer-reviewed]
Japanese, Scientific journal

Nanostructured anodic-alumina-based dielectrics for high-frequency integral capacitors
Alexander Mozalev, Masatoshi Sakairi, Hideaki Takahashi, Hiroki Habazaki, Jaromir Hubalek
THIN SOLID FILMS, 550, 486, 494, Jan. 2014, [Peer-reviewed]
English, Scientific journal

The corrosion resistance and passive film compositions of 12% Cr and. 15% Cr oxide dispersion strengthened steels in nitric acid media
S. Ningshen, M. Sakairi, K. Suzuki, S. Ukai
CORROSION SCIENCE, 78, 322, 334, Jan. 2014, [Peer-reviewed]
English, Scientific journal

The effects of the coating of anodized titanium with multi-walled carbon nanotuves on bone formation.
Inoue S, Uo M, Sakairi M, Hirata E, Lee M.H, Bae T.S, Akasaka T, Watari F, Yokoyama A
Key Engineering Materials, 529-530, 621, 624, Nov. 2013, [Peer-reviewed]
English, Scientific journal

Aluminum bulk micromachining through an anodic oxide mask by electrochemical etching in an acetic acid/perchloric acid solution
Tatsuya Kikuchi, Yuhta Wachi, Masatoshi Sakairi, Ryosuke O. Suzuki
MICROELECTRONIC ENGINEERING, 111, 14, 20, Nov. 2013, [Peer-reviewed]
English, Scientific journal

Analysis of chemical compositions and morphology of surface films formed on 3003 aluminum alloy by immersion in different cation containing model tap waters
M. Sakairi, K. Otani, A. Kaneko, Y. Seki, D. Nagasawa
SURFACE AND INTERFACE ANALYSIS, 45, 10, 1517, 1521, Oct. 2013, [Peer-reviewed]
English, Scientific journal

Formation of alumina films with nano-dot structures by successive liquid phase deposition, anodizing, and substrate dissolution
M. Sakairi, R. Fujita, H. Jha, T. Kikuchi
SURFACE AND INTERFACE ANALYSIS, 45, 10, 1510, 1516, Oct. 2013, [Peer-reviewed]
English, Scientific journal

Corrosion Resistance of 9% Cr Oxide Dispersion-Strengthened Steel in Different Electrolytic Media
S. Ningshen, M. Sakairi, K. Suzuki, S. Ukai
CORROSION, 69, 9, 863, 874, Sep. 2013, [Peer-reviewed]
English, Scientific journal

The passive film characterization and anodic polarization behavior of 11% Cr ferritic/martensitic and 15% Cr oxide dispersion strengthened steels in different electrolytic solutions
S. Ningshen, M. Sakairi, K. Suzuki, S. Ukai
APPLIED SURFACE SCIENCE, 274, 345, 355, Jun. 2013, [Peer-reviewed]
English, Scientific journal

Fabrication of a meniscus microlens array made of anodic alumina by laser irradiation and electrochemical techniques
Tatsuya Kikuchi, Yuhta Wachi, Taka-aki Takahashi, Masatoshi Sakairi, Ryosuke O. Suzuki
ELECTROCHIMICA ACTA, 94, 269, 276, Apr. 2013, [Peer-reviewed]
English, Scientific journal

Formation of Nanoporous structures on planner Al-Zn Alloy Lining Layers by Anodic Oxidation　　　　　　　　　　　　　　　
M. Ishida, T. Ohmi, M. Sakairi, M. Igugchi
Journal of JSEM, 13, S205, S208, 2013, [Peer-reviewed]
English, Scientific journal

Effects of alkali leaching on composition and surface structure of Cu-Al alloy layer produced by powder-metallurgical method,　　　　　　　　　　　　　　　
A. Maruyama, T. Ohmi, M. Sakairi, M. Iguchi
Journal of JSEM, 13, S193, D198, 2013, [Peer-reviewed]
English, Scientific journal

Corrosion resistance of 9-15% Cr ODS steels and its comparison with austenitic stainless steel
S. Ningshen, M. Sakairi, K. Suzuki, S. Ukai
CENTURY OF STAINLESS STEELS, 794, 575, +, 2013, [Peer-reviewed]
English, International conference proceedings

Structure control of Cu-Zn microchannel lining layers with electrochemical dissolution
K. Kobayashi, T. Ohmi, T. Kumagai, M. Sakairi, M. Iguchi
Journal of JSEM, 12, s213, s216, The Japanese Society for Experimental Mechanics, Sep. 2012, [Peer-reviewed]
English, Scientific journal, The effect of potentiostatic dissolution on the structure of a Cu-Zn alloy microchannel lining layer was investigated. The microchannel lining layer was fabricated by a powder-metallurgical process using copper powder and zinc wire. The lining layer became more porous after potentiostatic dissolution at a constant potential of −0.5 V vs. Ag/AgCl. The lining layer was remarkably dezinced and it contained many open pores under the dissolution condition at +0.5 V. These results indicate the possibility of precise structure control of the microchannel lining layer.

Composition and structure changes in Al3Ni2 microchannel lining layers by alkali leaching
Y. Saitoh, T. Ohmi, M. Sakairi, T. Kumagai, M. Iguchi
Journal of JSEM, 12, s237, s242, The Japanese Society for Experimental Mechanics, Sep. 2012, [Peer-reviewed]
English, Scientific journal, Effects of alkali leaching time on the composition and structure changes in the Al₃Ni₂ microchannel lining layer produced by a sacrificial-core method have been investigated. The composition was measured both on the specimen surface directly exposed to the leachant and on the new surface cut after alkali leaching. In each surface, the decrease in Al concentration became sluggish after formation of Ni₃Al. On the other hand, nano structure consisted of almost pure Ni was detected on the inner wall of the microchannel leached for 864 ks.

Influence of desiccation procedures on the surface wettability and corrosion resistance of porous aluminium anodic oxide films
Meng Zheng, Masatoshi Sakairi, Himendra Jha
CORROSION SCIENCE, 55, 332, 338, Feb. 2012, [Peer-reviewed]
English, Scientific journal

nodic oxidation behavior of Al-Zn alloy lining layer produced by a sacrificial-core method
M. Ishida, T. Ohmi, M. Sakairi, M. Iguhchi
Journal of JSEM, 12, s222, s225, The Japanese Society for Experimental Mechanics, 2012, [Peer-reviewed]
English, Scientific journal, We investigated the influence of Zn on anodic oxidation of planner Al-Zn lining layers produced by a sacrificial-core method. The Al-Zn lining layer was produced from aluminum powder and zinc plate. By comparison with experiments using sintered aluminum powder compacts, it was found that zinc hindered the formation of nanoporous alumina film. The nanoporous structure can be formed on the surface of the Al-Zn alloy lining layer by long time anodic oxidation of 7.2 ks.

Nonostructure anodic-alumina-based dielectrics for high-frequency integral capacitors　　　　　　　　　　　　　　　
A. Mozalev, M. Sakairi, H. Takahashi, H. Habazaki, J. Hubalek
Thin Solid Films, 2012, [Peer-reviewed]
English, Scientific journal

Structure Control of Cu-Zn Microchannel Lining Layers with Potentiostatic Dissolution　　　　　　　　　　　　　　　
Kazuki KOBAYASHI, Tatsuya OHMI, Masatoshi SAKAIRI, Manabu IGUCHI
Proc. 6th International Symposium on Advanced Science and Technology in Experimental Mechanics, [1/1(CD-ROM)], 037, Nov. 2011, [Peer-reviewed]
English, International conference proceedings

Local Cu Electro-Plating on Non-Conductive Substrate and Fabrication of Metal Structure with Solution Flow Type Micro-Droplet Cell
SAKAIRI Masatoshi, GOTO Yoshihito, KIKUCHI Tatsuya, FUSHIMI Koji
Journal of the Surface Finishing Society of Japan, 62, 10, 511, 515, 表面技術協会, Oct. 2011, [Peer-reviewed]
Japanese, A solution flow type microdroplet cell was applied to form a local copper line on a non-conductive substrate such as epoxy resin. During copper deposition, a copper rod was mounted in the epoxy resin as an electric feeding point. Such a copper line, which can be formed on the epoxy resin on flat and curved surfaces, can be removed from the epoxy resin, suggesting that this technique is applicable to form metal microstructures. The influence of the stage moving speed and applied current on the copper line thickness, shape, and conductivity were also investigated.

Corrosion resistant TiO2 film formed on magnesium by liquid phase deposition treatment
R. Fujita, M. Sakairi, T. Kikuchi, S. Nagata
ELECTROCHIMICA ACTA, 56, 20, 7180, 7188, Aug. 2011, [Peer-reviewed]
English, Scientific journal

Study on Hydrogen Storage System for Residential Energy System and Independent Power Supply with Hydrogen Absorbing Alloys and Air Heat Exchange Type Container : Part3-Energy Conservation Effect and Installation Analysis of Passive Hydrogen Storage Systems for Fuel Cell CHP Systems
SHIRATO Hiroyasu, HAMADA Yasuhiro, SUDA Takanori, SAKAIRI Masatoshi, OKA Yoshiaki, HAYASHI Hiroki, IKEDA Hideaki, NAGANO Katsunori
Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 171, 6, 1, 7, The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Jun. 2011, [Peer-reviewed]
Japanese, Scientific journal, This paper is the third report of a series of research on passive type hydrogen storage systems with hydrogen absorbing alloys. In this paper, we calculated energy conservation effect and executed installation analysis of the passive hydrogen storage systems that store and supply hydrogen from a reformer for fuel cell CHP (Combined Heat and Power) systems. Installation of the hydrogen storage systems to the fuel cell CHP systems for residential energy systems enables to reduce start-up energy and primary energy for response to electric load change. It was showed that from several kg to maximum 15kg of metal hydrides are necessary for the passive hydrogen storage systems and these systems are superior to batteries in terms of energy density, durability and initial cost. In conclusion, it was cleared that these systems are worth the installation for the fuel cell CHP systems.

Influence of cations on the corrosion behaviour of aluminium alloys in drinking water and model tap water　　　　　　　　　　　　　　　
M. Sakairi, Y. Kaneko, K. Otani, Y. Seki, D. Nagasawa
18th International Corrosion Congress 2011, 3, 1841, 1850, 2011
English, International conference proceedings

Repassivation behavior of titanium in artificial saliva investigated with a photon rupture method
Masatoshi Sakairi, Misaki Kinjyo, Tatsuya Kikuchi
ELECTROCHIMICA ACTA, 56, 4, 1786, 1791, Jan. 2011, [Peer-reviewed]
English, Scientific journal

SCC mechanism near fusion line of low c-13%cr welded joints
Shuji Hashizume, Toshiya Nakayama, Masatoshi Sakairi, Koji Fushimi
Zairyo to Kankyo/ Corrosion Engineering, 60, 4, 196, 201, 2011, [Peer-reviewed]
Japanese, Scientific journal

Alkali leaching of Ni-Al alloy microchannel lining layers
Y. Saito, T. Ohmi, M. Sakairi, M. Iguchi
Journal of JSEM, 11, ss276, ss279, The Japanese Society for Experimental Mechanics, 2011, [Peer-reviewed]
English, Scientific journal, We investigate alkali leaching of Ni-Al alloy microchannel lining layers to produce a metallic microreactor for high-temperature catalytic reactions. The microchannels and the lining layers were produced by a powder-metallurgical microchanneling process with Ni powder and Al wires. We explored the conditions for the process to produce an Al₃Ni or Al₃Ni₂ lining layer. The Al concentration of the lining layers was successfully decreased by alkali leaching.

Electrochemical detection of hydrogen generated by atmospheric corrosion of scratches in zinc coated steels - Effect of the scratched area
Shogo Takagi, Masatoshi Sakairi
Zairyo to Kankyo/ Corrosion Engineering, 60, 10, 435, 437, 2011, [Peer-reviewed]
English, Scientific journal

Anodizing of the inner wall of the microchannel formed in sintered aluminum body
M. Ishida, T. Ohmi, M. Sakairi, M. Iguchi
Journal of JSEM, 11, ss267, ss271, The Japanese Society for Experimental Mechanics, 2011, [Peer-reviewed]
English, Scientific journal, A fabrication method of a nanoporous anodic alumina film on the inner wall of a microchannel was investigated. An open microchannel was produced by a powder-metallurgical microchanneling process using Al as a body metal and Zn as a sacrificial-core metal. However, the cross-sectional area of the microchannel was larger than that of the sacrificial core; it increased as the compacting pressure increased. The nanoporous alumina film was produced by anodic oxidation of the inner wall of the microchannel.

Dealloying of Cu-Zn alloy microchannel lining layers for producing microporous catalyst
K. Kobayashi, T. Ohmi, M. Sakairi, M. Iguchi
Journal of JSEM, 11, ss280, ss283, The Japanese Society for Experimental Mechanics, 2011, [Peer-reviewed]
English, Scientific journal, A Cu-Zn alloy microchannel lining layer was fabricated by a powder-metallurgical process using Cu powder and Zn wire. The effects of the dealloying treatment on the composition and structure of the lining layer were investigated. The lining layer became more porous and dezinced as the dealloying time increased. In the case of long-time dealloying, Zn-based corrosion products precipitated. These results indicated the possibility of the control of the structure and composition of the inner wall of the microchannel.

Area Selective Formation of Porous Type Aluminum Anodic Oxide Film by a Solution flow-type Micro Droplet Cell
T. Murata, Y. Goto, M. Sakairi, K. Fushimi, T. Kikuchi
ECS Transactions, 33, 16, 57, 63, 2011, [Peer-reviewed]
English, International conference proceedings

Anodic Oxidation of the Inner Wall of the Microchannel Formed in Sintered Aluminum Body　　　　　　　　　　　　　　　
Masashi ISHIDA, Tatsuya OHMI, Masatoshi SAKAIRI, Manabu IGUCHI
Proc. 5th International Symposium on Advanced Science and Technology in Experimental Mechanics, [1/1(CD-ROM)], 068, Nov. 2010, [Peer-reviewed]
English, International conference proceedings

Influence of wettability on corrosion resistance of anodized aluminum in NaCl solution
M. Zheng, H. Jha, M. Sakairi, T. Kikuchi
Zairyo-to-Kankyo, 59, 9, 335, 337, 腐食防食協会, Sep. 2010, [Peer-reviewed]
English, Scientific journal

Fabrication of Reusable Aluminum Printing Plate with Conducting Polymer
KIKUCHI TATSUYA, SHIMAGUCHI HIROKO, UEDA MIKITO, SAKAIRI MASATOSHI, YONEZAWA TETSU, TAKAHASHI HIDEAKI
表面技術, 61, 9, 652, 657, The Surface Finishing Society of Japan, Sep. 2010, [Peer-reviewed]
Japanese, A printing plate for gravure printing consisting of five layers of aluminum alloy / anodic oxide film / nickel / polypyrrole / copper was fabricated by anodizing, electro-less plating, electroplating, and electro-polymerization. Nickel layers were first deposited on anodic oxide film-covered aluminum alloy by electro-less plating and electroplating. The polypyrrole layer was then deposited on the nickel layer by anodic polarization in a pyrrole monomer solution. Many copper fine particles were deposited on the polypyrrole-deposited specimen at the initial stage of electroplating in the CuSO₄ / H₂SO₄ solution; then a continuous copper layer was obtained through longer cathodic polarization. The copper layer with polypyrrole was removed easily from the nickel layer by pulling with adhesive tape, which suggests that the structure is useful as a reusable aluminum printing plate by copper electroplating and electro-polymerization.

Corrosion of Al-Sn-Bi alloys in alcohols at high temperatures. Part II: Effect of anodizing on corrosion
Tatsuya Kikuchi, Yasuhito Hara, Masatoshi Sakairi, Tetsu Yonezawa, Akira Yamauchi, Hideaki Takahashi
CORROSION SCIENCE, 52, 8, 2525, 2534, Aug. 2010, [Peer-reviewed]
English, Scientific journal

Corrosion of Al-Sn-Bi alloys in alcohol at high temperatures. Part I: Effects of the metallurgical structure of the alloys and the metal salt additions to alcohol
Tatsuya Kikuchi, Yasuhito Hara, Masatoshi Sakairi, Tetsu Yonezawa, Akira Yamauchi, Hideaki Takahashi
CORROSION SCIENCE, 52, 4, 1482, 1491, Apr. 2010, [Peer-reviewed]
English, Scientific journal

Formation of artificial micro-pits on Al alloy with the photon rupture method and the localized corrosion behavior of the formed pits
K. Yanada, M. Sakairi, T. Kikuchi, Y. Oya, Y. Kojima
SURFACE AND INTERFACE ANALYSIS, 42, 4, 189, 193, Apr. 2010, [Peer-reviewed]
English, Scientific journal

The influence of initial surface conditions on field crystallization of anodic aluminum oxide films determined by synchrotron X-ray diffraction
M. Sakairi, T. Kikuchi, T. Suda, D. Nagasawa, M. Sato
SURFACE AND INTERFACE ANALYSIS, 42, 4, 215, 220, Apr. 2010, [Peer-reviewed]
English, Scientific journal

Aluminum Microstructures on Anodic Alumina for Aluminum Wiring Boards
Himendra Jha, Tatsuya Kikuchi, Masatoshi Sakairi, Hideaki Takahashi
ACS APPLIED MATERIALS & INTERFACES, 2, 3, 774, 777, Mar. 2010, [Peer-reviewed]
English, Scientific journal

Fabrication of Cu Micro-rods with Co-axial Dual Capillary Solution Flow Type Droplet Cell and Electrodeposition with the Cell
Masatoshi Sakairi, Yoshihito Goto, Koji Fushimi, Tatsuya Kikuchi, Hideaki Takahashi
ELECTROCHEMISTRY, 78, 2, 118, 121, Feb. 2010, [Peer-reviewed]
English, Scientific journal

Model cut-edge formed on zinc coated steels by laser machining and its corrosion behavior　　　　　　　　　　　　　　　
M. Sakairi, A. Kageyama, T. Kikuhci
Corrosion Science and Technology, 9, 1, 29, 33, Jan. 2010, [Peer-reviewed]
English, Scientific journal

Study on Hydrogen Storage System for Residential Energy System and Independent Power Supply with Hydrogen Absorbing Alloys and Air Heat Exchange Type Container : Part 2-Effect of Higher Equilibrium Pressure Alloy and Containers with Fins or Small Diameter Tube Type Containers for Hydrogen Absorption and Desorption Characteristics
SHIRATO Hiroyasu, HAMADA Yasuhiro, SUDA Takanori, SAKAIRI Masatoshi, OKA Yoshiaki, HAYASHI Hiroki, IKEDA Hideaki, NAGANO Katsunori
Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 159, 159, 1, 9, The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Jan. 2010, [Peer-reviewed]
Japanese, Scientific journal, This paper is the second report of a series of research on a passive type hydrogen storage system with hydrogen absorbing alloys for two purposes. [1] It aims to improve hydrogen absorption and desorption characteristics of the system by using MmNi_5 as a higher equilibrium pressure alloy and containers with fins or small diameter tube type containers that are enlarged the surface area of the containers per MmNi_5 weight. [2] It also aims to investigate possible introduction of the hydrogen system for independent power supply or residential energy system. Both the containers with fins for independent power supply and the small diameter tube type containers for residential energy system are practical from a viewpoint of the hydrogen absorption-desorption flow rate and the total hydrogen storage capacity.

Effect of cations on corrosion behavior of aluminum alloy in model tap water
Kyohei Otani, Masatoshi Sakairi, Tatsuya Kikuchi, Akira Kaneko
Zairyo to Kankyo/ Corrosion Engineering, 59, 9, 330, 331, Japan Society of Corrosion Engineering, 2010, [Peer-reviewed]
English, Scientific journal

Development of a Low Solution Resistance Type Solution Flow Droplet Cell and Investigation of Its Electrochemical Performance
Masatoshi Sakairi, Takuya Murata, Tatsuya Kikuchi, Koji Fushimi
ISIJ INTERNATIONAL, 50, 10, 1466, 1470, 2010, [Peer-reviewed]
English, Scientific journal

Fromation of nanoporous anodic oxide films on Ti-Al microchannel walls
M. Ishida, T. Ohmi, M. Sakairi, M. Iguchi
Journal of JSEM, 10, 210, 214, The Japanese Society for Experimental Mechanics, 2010, [Peer-reviewed]
English, Scientific journal, Fabrication of a nanoporous anodic oxide film on the inner wall of a microchannel was experimented. The microchannel was produced in a titanium body by a powder-metallurgical microchanneling process and was lined with a Ti-Al alloy layer. We found an appropriate anodic condition for an exposed planner surface of the Ti-Al alloy layer. In the case of the microchannel, the growth of the nanoporous oxide film tended to retard deep inside the channel. This problem was easily solved by lengthening the anodic oxidation time.

Formation of model scratch on pre-painted coated steel by laser machining and its wet/dry corrosion behavior
Masatoshi Sakairi, Miki Uchida, Tatsuya Kikuchi
Zairyo to Kankyo/ Corrosion Engineering, 59, 10, 379, 381, Japan Society of Corrosion Engineering, 2010, [Peer-reviewed]
English, Scientific journal

The Effect of Surface Condition and Solution Composition on the Repassivation Behavior of Titanium Studied by PRM in Vitro
M. Sakairi, H. Miyata, M. Kinjyo, T. Kikuchi
OXIDE FILMS, 25, 40, 37, 45, 2010, [Peer-reviewed]
English, International conference proceedings

Wet/Dry Cycle Corrosion Behavior of Model Cut-Edge Formed on Pre-painted Zinc Alloy Coated Steels by Laser Fabrication
M. Sakairi, A. Kageyama, T. Kikuchi
COATINGS FOR CORROSION PROTECTION, 25, 29, 71, 79, 2010, [Peer-reviewed]
English, International conference proceedings

Growth of porous type anodic oxide films at micro-areas on aluminum exposed by laser irradiation
Tatsuya Kikuchi, Masatoshi Sakairi, Hideaki Takahashi
ELECTROCHIMICA ACTA, 54, 27, 7018, 7024, Nov. 2009, [Peer-reviewed]
English, Scientific journal

Anodic Oxidation of the Inner Wall of the Microchannel Formed by Ti-Al Reactive Infiltration　　　　　　　　　　　　　　　
Masashi Ishida, Tatsuya Ohmi, Masatoshi Sakairi, Manabu Iguchi
Proc. 4th International Symposium on Advanced Fluid/Solid Science and Technology in Experimental Mechanics (ISEM2009), [1/1(CD-ROM)], MA-V-3, Nov. 2009, [Peer-reviewed]
English, International conference proceedings

Palladium nanoparticle seeded electroless metallization of Al/Al2O3 surfaces
Himendra Jha, Tatsuya Kikuchi, Masatoshi Sakairi, Hideaki Takahashi
MATERIALS LETTERS, 63, 16, 1451, 1454, Jun. 2009, [Peer-reviewed]
English, Scientific journal

ポリピロール／金の２層構造を有する３次元マイクロアクチュエーターの作製
菊地竜也, 上田晋吾, 上田幹人, 坂入正敏, 高橋英明
表面技術, 60, 5, 335, 341, May 2009, [Peer-reviewed]
Japanese, Scientific journal

Fabrication of Three-dimensional Micro-actuators with Polypyrrole / Gold Bi-layer Structure
KIKUCHI Tatsuya, UEDA Shingo, UEDA Mikito, SAKAIRI Masatoshi, TAKAHASHI Hideaki
Journal of The Surface Finishing Society of Japan, 60, 5, 335, 341, 表面技術協会, May 2009, [Peer-reviewed]
Japanese, Three-dimensional micro-actuators consisting of a polypyrrole (PPy)/Au bi-layer, were fabricated by Al anodizing, laser irradiation, and electrochemical techniques. Aluminum specimens covered with porous type oxide films were irradiated with a pulsed Nd-YAG laser to remove the oxide films locally. Then an Au layer and a PPy layer were deposited at the area where the film had been removed. Finally, the specimens were immersed in a NaOH solution after connection with or without a Pt plate to separate PPy/Au actuators from the Al substrate and anodic oxide film. The PPy layer did not lose its...

Metallization of oxide / hydroxide film of aluminum: the palladium activation techniques
H. Jha, T. Kikuchi, M. Sakairi, H. Takahashi
表面技術, 60, 3, 208, 212, Mar. 2009, [Peer-reviewed]
English, Scientific journal

Optimization of environment-friendly electrochemical polishing process for titanium plate electrode　　　　　　　　　　　　　　　
Masatoshi Sakairi, Misaki Kinjyo, Tatsuya Kikuchi
The Minerals, Metals and Materials Society - 3rd International Conference on Processing Materials for Properties 2008, PMP III, 1, 71, 75, 2009
English, International conference proceedings

Growth of multioxide planar film with the nanoscale inner structure via anodizing Al/Ta layers on Si
A. Mozalev, A. J. Smith, S. Borodin, A. Plihauka, A. W. Hassel, M. Sakairi, H. Takahashi
ELECTROCHIMICA ACTA, 54, 3, 935, 945, Jan. 2009, [Peer-reviewed]
English, Scientific journal

Effect of potential, temperature, and fluoride ions on the repassivation kinetics of titanium in phosphate buffered saline solution with the photon rupture method
Masatoshi Sakairi, Hiroomi Miyata, Tatsuya Kikuchi, Hideaki Takahashi
Laser Chemistry, 2009, 436065, 2009, [Peer-reviewed]
English, Scientific journal

Effect of aspect ratio of artificial pits formed on anodized Al by PRM on localized corrosion in chloride environments
M. Sakairi, A. Kageyama, Y. Kojima, Y. Oya, T. Kikuchi
ECS Transactions, 16, 43, 19, 28, 2009, [Peer-reviewed]
English, International conference proceedings

Highly uniform aluminum oxy-hydroxide nanofiber from porous anodic alumina
Himendra Jha, Tatsuya Kikuchi, Masatoshi Sakairi, Hideaki Takahashi
ECS Transactions, 16, 25, 91, 96, 2009, [Peer-reviewed]
English, International conference proceedings

Electrochemical Noise Analysis of 13 mass% Cr Stainless Steel HAZ by Solution Flow Type Micro-droplet Cell-Effect of Solution Concentration-
S. Hashizume, T. Nakayama, M. Sakairi, K. Fushimi
ECS transactions, 16, 52, 281, 290, 2009, [Peer-reviewed]
English, International conference proceedings

Development of a novel microstructure fabrication method with co-axial dual capillary solution flow type droplet cells and electrochemical deposition
Sakairi Masatoshi, Sato Fumihito, Gotou Yoshihito, Fushimi Koji, Kikuchi Tatsuya, Takahashi Hideak
Electrochimica Acta, 54, 2, 616, 622, 30 Dec. 2008, [Peer-reviewed]
English, Scientific journal

Fabrication of micro-dot arrays and micro-walls of acrylic acid/melamine resin on aluminum by AFM probe processing and electrophoretic coating
S. Kurokawa, T. Kikuchi, M. Sakairi, H. Takahashi
ELECTROCHIMICA ACTA, 53, 28, 8118, 8127, Nov. 2008, [Peer-reviewed]
English, Scientific journal

Synthesis of aluminum oxy-hydroxide nanofibers from porous anodic alumina
Himendra Jha, Tatsuya Kikuchi, Masatoshi Sakairi, Hideaki Takahashi
NANOTECHNOLOGY, 19, 39, 395603, Oct. 2008, [Peer-reviewed]
English, Scientific journal

Fabrication of Cu Micro-pattern on Organic Resin Board by Electroless Plating and Laser Irradiation
KIKUCHI Tatsuya, WACHI Yuta, SAKAIRI Masatoshi, TAKAHASHI Hideaki, IINO Kiyoshi, KATAYAMA Naoki
Journal of The Surface Finishing Society of Japan, 59, 8, 555, 561, 表面技術協会, Aug. 2008, [Peer-reviewed]
Japanese, A printed circuit board with a fine Cu pattern was fabricated by electroless plating and laser irradiation. A glass fiber-reinforced epoxy resin plate was immersed in a Pd2+ solution and a Cu layer was then deposited on the epoxy resin by Cu electroless plating. After Cu plating, the Cu deposited specimen was irradiated with a pulsed Nd-YAG laser through an iris diaphragm and a convex lens to remove the Cu layer locally in air or doubly distilled water. The width of the Cu removed area increased with increasing the laser power and with decreasing the scanning rate of the laser beam. When la...

Study on Hydrogen Storage System for Residential Energy System and Stand-Alone Power Supply with Hydrogen Absorbing Alloys and Air Heat Exchange Type Container : Part 1-Hydrogen Absorption and Desorption Behavior of Hydrogen Storage System with Hydrogen Absorbing Alloys and Air Heat Exchange Type Container
SHIRATO Hiroyasu, HAMADA Yasuhiro, SUDA Takanori, SAKAIRI Masatoshi, OKA Yoshiaki, HAYASHI Hiroki, IKEDA Hideaki, NAGANO Katsunori
Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 134, 134, 11, 19, The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, May 2008, [Peer-reviewed]
Japanese, Scientific journal, In this thesis, the hydrogen absorption and desorption behavior of the Hydrogen Storage System with hydrogen absorbing alloys and the air heat exchange type container for residential energy system and stand-alone power supply was cleared. When the pressure difference between the alloy equilibrium dissociation pressure and piping was 0.1MPa or more, the hydrogen desorption characteristic of this system was excellent. When the absorption rate was 0.8MPa, the hydrogen storage capacity was dependant on the room temperature and the absorption rate. And it was showed that this system could have the extensive hydrogen storage capacity in the condition of the room temperature 5, 20℃ and the absorption flow rate 0.1NL/(min・kg), or the room temperature 35℃ and the absorption flow rate 0.025, 0.05NL/(min・kg).

Hydrogen Absorption into Anodized Niobium Electrodes during Cathodic Polarization
NAGAHARA Kazuhiro, KIKUCHI Tatsuya, FUSHIMI Kouji, SAKAIRI Masatoshi, TAKAHASHI Hideaki, IZUMI Tomoo
Journal of The Surface Finishing Society of Japan, 59, 5, 326, 332, 一般社団法人 表面技術協会, May 2008, [Peer-reviewed]
Japanese, Cathodic polarization of niobium specimens that have been anodized galvanostatically up to Ea=100V, and then potentiostatically at Ea=100V has been investigated in a neutral borate solution. During potetiostatic cathodic polarization below Ec=−2.36V (vs. RHE) in both aerated and deaerated solutions, the cathodic current increased rapidly initially, and then increased gradually until it reached a steady value. Hydrogen gas evolution was observed during cathodic polarization below Ec=−2.36V with no formation of blisters and pits, suggesting that H+ reduction occurs mainly at the film surface....

Galvanic corrosion of anodized aluminum - Influence of anodic oxide film structure and concentration of Cl--
Masatoshi Sakairi, Yukiya Shimoyama, Daisuke Nagasawa, Tatsuya Kikkuchi, Hideaki Takahashi
Zairyo to Kankyo/ Corrosion Engineering, 57, 4, 194, 200, 腐食防食協会, Apr. 2008, [Peer-reviewed]
Japanese, Scientific journal

Electrochemical random signal analysis during localized corrosion of anodized 1100 aluminum alloy in chloride environments　　　　　　　　　　　　　　　
M. Sakairi, Y. Shimoyama, D. Nagasawa
Corrosion Science and Technology, 7, 3, 168, 172, Mar. 2008, [Peer-reviewed]
English, Scientific journal

Influence of zinc ions on initial stage of localized corrosion of Zn and Zn-Al alloy coated steels with photon rupture method
Masatoshi Sakairi, Yoshiyuki Uchida, Tatsuya Kikuchi, Hideaki Takahashi
ISIJ INTERNATIONAL, 48, 7, 988, 993, 2008, [Peer-reviewed]
English, Scientific journal

Thick Platinum Layer Deposition on Ceramics by Electroless- and Electro-plating
KIKUCHI Tatsuya, WATANABE Takeshi, SAKAIRI Masatoshi, TAKAHASHI Hideaki, MARUKO Tomohiro
Journal of The Surface Finishing Society of Japan, 59, 1, 51, 56, 表面技術協会, Jan. 2008, [Peer-reviewed]
Japanese, A thick platinum metal layer was deposited on ceramics using electroless- and electro-plating. The ceramics, which consist of ZrO2, Al2O3, SiO2, Na2O, and other oxides, were etched in HF solution, and then immersed in a platinum electroless plating solution containing Pt(NH3)2(NO2)2 and N2H4 as a reducing regent. The mass of the ceramics specimen decreased slightly with the electroless plating time and then increased at a rate depending on temperature, but independent of Pt2+ concentration. A2μm thick platinum layer could be deposited uniformly on ceramics by electroless plating for 14.4ks ...

Electrochemical Behavior of Low C-13%Cr Weld Joints by Using Solution Flow Type Micro-droplet Cell
S. Hashizume, T. Nakayama, M. Sakairi, K. Fushimi
Proc. of NACE2008, 081021, 0810216, 2008, [Peer-reviewed]
English, International conference proceedings

Microfabrication of an anodic oxide film by anodizing laser-textured aluminium
Himendra Jha, Tatsuya Kikuchi, Masatoshi Sakairi, Hideaki Takahashi
JOURNAL OF MICROMECHANICS AND MICROENGINEERING, 17, 10, 1949, 1955, Oct. 2007, [Peer-reviewed]
English, Scientific journal

Dielectric properties of Al-Si composite oxide films formed on electropolished and DC-etched aluminum by electrophoretic sol-gel coating and anodizing
M. Sunada, H. Takahashi, T. Kikuchi, M. Sakairi, S. Hirai
JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 11, 10, 1375, 1384, Oct. 2007, [Peer-reviewed]
English, Scientific journal

Laser micromachining of porous anodic alumina film
H. Jha, T. Kikuchi, M. Sakairi, H. Takahashi
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 88, 4, 617, 622, Sep. 2007, [Peer-reviewed]
English, Scientific journal

Nb2O5 deposition on aluminum from NbCl5-used sol and anodizing of Nb2O5-coated Al
Shun Koyama, Tatsuya Kikuchi, Masatoshi Sakairi, Hideaki Takahashi, Shinji Nagata
ELECTROCHEMISTRY, 75, 8, 573, 575, Aug. 2007, [Peer-reviewed]
English, Scientific journal

Area-selective microscale metallization on porous anodic oxide film of aluminium
Himendra Jha, Tatsuya Kikuchi, Masatoshi Sakairi, Hideaki Takahashi
ELECTROCHEMISTRY COMMUNICATIONS, 9, 7, 1596, 1601, Jul. 2007, [Peer-reviewed]
English, Scientific journal

Development of three-electrode type micro-electrochemical reactor on anodized aluminum with photon rupture and electrochemistry
Masatoshi Sakairi, Masashi Yamada, Tastuya Kikuchi, Hideaki Takahashi
ELECTROCHIMICA ACTA, 52, 21, 6268, 6274, Jun. 2007, [Peer-reviewed]
English, Scientific journal

Initial stage of localized corrosion in artificial pits formed with photon rupture on Zn-5 mass% Al alloy-coated steel
Masatoshi Sakairi, Yoshiyuki Uchida, Hideaki Takahashi
CORROSION SCIENCE, 49, 5, 2362, 2370, May 2007, [Peer-reviewed]
English, Scientific journal

Micro-patterning in anodic oxide film on aluminium by laser irradiation
H. Jha, T. Kikuchi, M. Sakairi, H. Takahashi
ELECTROCHIMICA ACTA, 52, 14, 4724, 4733, Apr. 2007, [Peer-reviewed]
English, Scientific journal

Fabrication of a three-dimensional micro-manipulator by laser irradiation and electrochemical techniques and the effect of electrolytes on its performance
T. Kikuchi, Y. Akiyama, A. Ueda, A. Sakairi, H. Takahashi
ELECTROCHIMICA ACTA, 52, 13, 4480, 4486, Mar. 2007, [Peer-reviewed]
English, Scientific journal

Mechanism of formation and growth of sunflower-shaped imperfections in anodic oxide films on niobium
K. Nagahara, M. Sakairi, H. Takahashi, K. Matsumoto, K. Takayama, Y. Oda
ELECTROCHIMICA ACTA, 52, 5, 2134, 2145, Jan. 2007, [Peer-reviewed]
English, Scientific journal

Electrochemical random signal analysis during galvanic corrosion of anodized aluminum alloy
M. Sakairi, Y. Shimoyama
Journal of JSEM, 7, 114, 119, 日本実験力学会, 2007, [Peer-reviewed]
English, Scientific journal

Investigations on the local electrochemical behavior of welded stainless steels with solution flow type micro-droplet cell　　　　　　　　　　　　　　　
T. Nakayama, M. Sakairi, K. Fushimi, S. Hashizume
Proceedings of EUROCORR 2007 (CD-ROM), 1130, 2007, [Peer-reviewed]
English, International conference proceedings

Local deposition of polypyrrole on aluminum by anodizing, laser irradiation, and electrolytic polymerization and its application to the fabrication of micro-actuators
Y Akiyama, T Kikuchi, M Ueda, M Iida, M Sakairi, H Takahashi
ELECTROCHIMICA ACTA, 51, 23, 4834, 4840, Jun. 2006, [Peer-reviewed]
English, Scientific journal

Electrochemical noise analysis of galvanic corrosion of anodized aluminum in chloride environments
Masatoshi Sakairi, Yukiya Shimoyama, Hideaki Takahashi
ELECTROCHEMISTRY, 74, 6, 458, 462, Jun. 2006, [Peer-reviewed]
English, Scientific journal

Localized Dissolution of Zn-Al Alloy Coated Steel in Neutral Solution with Cl^- by Photon Rupture Method(Surface Treatment and Corrosion)
SAKAIRI Masatoshi, ITABASHI Kazuma, UTIDA Yoshiyuki, TAKAHASHI Hideaki
Tetsu- to- Hagane, 92, 2, 68, 74, 社団法人日本鉄鋼協会, Feb. 2006, [Peer-reviewed]
Japanese, A photon rupture method, film removal by a focused one pulse of pulsed Nd-YAG laser beam irradiation, has been applied to investigate initial stage of localized dissolution of Zn and Zn-Al alloy coated steels, which were formed nitrocellulose films as a protective film, in 0.5 kmol m^<-3> H_3BO_3-0.05 kmol m^<-3> Na_2B_4O_7 (pH=7.4) with 0.01 kmol m^<-3> chloride ions. This method can remove oxide films and nitrocellulose films on coated layer by laser ablation without any contamination from film removing tools, and the removing speed is extremely high. At low applied potentials, all sample...

Localized dissolution of Zn-Al alloy coated steel in neutral solution with Cl- by photon rupture method
M Sakairi, K Itabashi, Y Utida, H Takahashi
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 92, 2, 16, 22, Feb. 2006, [Peer-reviewed]
Japanese, Scientific journal

Blister and pit formation during cathodic polarization of aluminum covered with anodic oxide films - In-situ AFM observation　　　　　　　　　　　　　　　
S. Kurokawa, Z. Kalo, T. Kikuchi, M. Sakairi, H. Takahashi
Proceedings - Electrochemical Society, PV 2004-19, 447, 462, 2006
English, International conference proceedings

Fabrication of electrochemical micro-reactor by photon rupture method and electrochemistry　　　　　　　　　　　　　　　
Masatoshi Sakairi, Masashi Yamada, Hideaki Takahashi
Proceedings - Electrochemical Society, PV 2004-19, 359, 370, 2006
English, International conference proceedings

Localized Dissolution of Zn-Al Alloy Coated Steel in Neutral Solution with Cl^- by Photon Rupture Method(Surface Treatment and Corrosion)
SAKAIRI Masatoshi, ITABASHI Kazuma, UTIDA Yoshiyuki, TAKAHASHI Hideaki
Tetsu- to- Hagane, 92, 2, 16, 22, The Iron and Steel Institute of Japan (ISIJ), 2006
Japanese, A photon rupture method, film removal by a focused one pulse of pulsed Nd-YAG laser beam irradiation, has been applied to investigate initial stage of localized dissolution of Zn and Zn-Al alloy coated steels, which were formed nitrocellulose films as a protective film, in 0.5 kmol m^<-3> H_3BO_3-0.05 kmol m^<-3> Na_2B_4O_7 (pH=7.4) with 0.01 kmol m^<-3> chloride ions. This method can remove oxide films and nitrocellulose films on coated layer by laser ablation without any contamination from film removing tools, and the removing speed is extremely high. At low applied potentials, all samples reformed oxide film after films were removed by this method. The oxide film formation kinetics follows on inverse logarithmic law in agreement with Cabrera-Mott theory. However, as increasing applied potential, after some period, localized dissolution occur at nitrocellulose films were removed area. The peak currents of Zn-5mass%Al coated steel specimens were larger than those of Zn and Zn-5mass%Al coated specimens. This result suggest that high aluminum containing coated layer does not show good corrosion resistance in frequently oxide film removal environments.

Initial stage of localized corrosion in artificial pits formed with photon rupture on 55mass%Al-Zn coated steels
Masatoshi Sakairi, Yoshiyuki Uchida, Hideaki Takahashi
ISIJ INTERNATIONAL, 46, 8, 1218, 1222, 2006, [Peer-reviewed]
English, Scientific journal

Initial stage of localized corrosion in artificial pit formed on zinc coated steels by photon rupture
Sakairi Masatoshi, Uchida Yoshiyuki, Takahashi Hideaki
Passivation of Metals and Semiconductors, and Properties of Thin Oxide Layers, 561, 566, Elsevier, 2006, [Peer-reviewed]
English, In book

Formation of Al-Si Composite Oxide Films on Aluminum by Electrophoretic Sol-Gel Coating/Anodizing
H.Takahashi, M.Sunada, T.Kikuchi, M.Sakairi, S.Hirai
Passivation of Materials and Semiconductors, and Thin Oxide Layers,, 685, 690, 2006, [Peer-reviewed]
English

The growth and electrical transport properties of self-organized metal/oxide nanostructures formed by anodizing Ta-Al thin-film bilayers
A Mozalev, G Gorokh, M Sakairi, H Takahashi
JOURNAL OF MATERIALS SCIENCE, 40, 24, 6399, 6407, Dec. 2005, [Peer-reviewed]
English, Scientific journal

The initial stage of pitting corrosion on coated steels investigated by photon rupture in chloride containing solutions
M Sakairi, Y Uchida, K Itabashi, H Takahashi
CORROSION SCIENCE, 47, 10, 2461, 2469, Oct. 2005, [Peer-reviewed]
English, Scientific journal

Anodic film growth on Al layers and Ta-Al metal bilayers in citric acid electrolytes
A Mozalev, Mozaleva, I, M Sakairi, H Takahashi
ELECTROCHIMICA ACTA, 50, 25-26, 5065, 5075, Sep. 2005, [Peer-reviewed]
English, Scientific journal

Electrochemical noise study on galvanic corrosion of anodized aluminum in chloride environments　　　　　　　　　　　　　　　
Masatoshi Sakairi, Ukiya Shimoyama, Hideaki Takahashi
Proceedings - Electrochemical Society, PV 2004-14, 265, 272, 2005
English, International conference proceedings

Analysis of the initial stage of localized corrosion on Zn and Zn alloy coated steels by photon rupture method
M Sakairi, K Itabashi, H Takahashi
ISIJ INTERNATIONAL, 45, 1, 71, 76, 2005, [Peer-reviewed]
English, Scientific journal

Initial stage of localized corrosion on titanium in phosphate buffer solutions by photon rupture
Masatoshi Sakairi, Hiroomi Miyata, Hideaki Takahashi
ECS Transactions, 1, 4, 183, 194, 2005, [Peer-reviewed]
English, International conference proceedings

Influence of Current Density on the Structure and Dielectric Properties of Anodic Oxide Films on Niobium
NAGAHARA Kazuhiro, SAKAIRI Masatoshi, TAKAHASHI Hideaki, NAGATA Shinji, MATSUMOTO Kazuyoshi, TAKAYAMA Koichi, ODA Yukio
Journal of The Surface Finishing Society of Japan, 55, 12, 943, 951, 一般社団法人 表面技術協会, Dec. 2004, [Peer-reviewed]
Japanese, Scientific journal, Niobium specimens with chemical polishing were anodized in a phosphoric acid solution galvanostatically at ia,ini=1, 10, 100 and 1000Am−2 up to Ea=100V, and then potentiostatically at Ea=100V for tpa=7.2ks. During galvanostatic anodizing, the anode potential increased almost linearly with time on all the specimens, while, during potentiostatic anodizing, the anodic current decreased with time. The current density at tpa=7.2ks was higher at lower ia,ini in the range of 0.02 to 0.25Am−2. The spectra of Rutherford backscattering spectroscopy (RBS) and glow discharge optical emission spectrosco...

Change in the structure and dielectric properties of niobium anodic oxide films during potentiostatic anodizing
K Nagahara, M Sakairi, H Takahashi, K Matsumoto, K Takayama, Y Oda
ELECTROCHEMISTRY, 72, 9, 624, 632, Sep. 2004, [Peer-reviewed]
English, Scientific journal

Formation of Al-Nb Composite Oxide Films by Sol-Gel Coating and Anodizing
WATANABE Keiji, SAKAIRI Masatoshi, TAKAHASHI Hideaki, NAGATA Shinji, HIRAI Shinji
Journal of The Surface Finishing Society of Japan, 55, 7, 471, 477, 一般社団法人 表面技術協会, Jul. 2004, [Peer-reviewed]
Japanese, Scientific journal, Aluminum specimens coated with niobium oxide by a sol-gel method were galvanostatically anodized in a neutral borate solution. The time-variations in anode potential during anodizing were monitored, and the structure and dielectric properties of the anodic oxide film were studied by TEM, EDX, RBS, and electrochemical impedance measurements.It was found that the anode potential increases linearly with time after a rapid increase in potential at the initial period of anodizing. During anodizing, an anodic oxide film, which consisted of an inner Al2O3 layer and an outer Al-Nb composite oxide l...

Localized Removal of Aluminum Hard Anodic Oxide Film by Pulsed YAG Laser Irradiation
SAKAIRI Masatoshi, YAMASHITA Shingo, TAKAHASHI Hideaki, SHIMAMURA Kiyotaka, KATAYAMA Naoki, ABE Yoshihiko
Journal of The Surface Finishing Society of Japan, 55, 5, 349, 354, 一般社団法人 表面技術協会, May 2004, [Peer-reviewed]
Japanese, Scientific journal, A laser beam micro surface finishing method attempted to remove hard anodic oxide film formed on aluminum specimens. The hardness of the film increases with increasing applied current density during anodizing and decreasing concentration of SO42− ions. Specimens were irradiated in solutions with a pulsed Nd-YAG laser beam through a convex lens with 60mm focal length to remove anodic oxide film locally. Thin anodic oxide film can be removed without cracks by one pulse of laser irradiation, but thick oxide films need several pulses of irradiation removed without cracks. Thick as grown hard an...

Structure, morphology, and dielectric properties of nanocomposite oxide films formed by anodizing of sputter-deposited Ta-Al bilayers
A Mozalev, M Sakairi, H Takahashi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 151, 11, F257, F268, 2004, [Peer-reviewed]
English, Scientific journal

Behavior of second-phase particles in Al5052 alloy during anodizing in a sulfuric acid solution - CSLM observation
SM Moon, M Sakairi, H Takahashi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 151, 7, B399, B405, 2004, [Peer-reviewed]
English, Scientific journal

Local removal of thick anodic oxide film on aluminum with a photon rupture technique and local metal deposition
M Sakairi, Z Kato, SZ Chu, H Takahashi, Y Abe, N Katayama
ELECTROCHEMISTRY, 71, 11, 920, 926, Nov. 2003, [Peer-reviewed]
English, Scientific journal

Application of CSLM to the surface morphological study of al 5052 alloy anodized in sulfuric acid solution
SM Moon, M Sakairi, H Takahashi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 150, 10, B473, B480, Oct. 2003, [Peer-reviewed]
English, Scientific journal

Nucleation and growth of the nanostructured anodic oxides on tantalum and niobium under the porous alumina film
A Mozalev, M Sakairi, Saeki, I, H Takahashi
ELECTROCHIMICA ACTA, 48, 20-22, 3155, 3170, Sep. 2003, [Peer-reviewed]
English, Scientific journal

Three-dimensional Microstructure Fabrication with Aluminum Anodizing, Laser Irradiation, and Electrodeposition
T. Kikuchi, M. Sakairi, H. Takahashi
Journal of the Electrochemical Society, 150, 9, C567, C572, Sep. 2003, [Peer-reviewed]
English, Scientific journal

Nanopatterning on aluminum surfaces with AFM probe
Z Kato, M Sakairi, H Takahashi
SURFACE & COATINGS TECHNOLOGY, 169, 195, 198, Jun. 2003, [Peer-reviewed]
English, Scientific journal

Fabrication of independent nickel microstructures with anodizing of aluminum, laser irradiation, and electrodeposition
T Kikuchi, M Sakairi, H Takahashi
JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, 10, 3, 39, 42, Jun. 2003, [Peer-reviewed]
English, Scientific journal

Electroless Ni-P deposition through imperfections in anodic oxide films on aluminum and Al5052 alloy
S Moon, M Sakairi, H Takahashi, K Shimamura
ELECTROCHEMISTRY, 71, 4, 260, 265, Apr. 2003, [Peer-reviewed]
English, Scientific journal

Anodizing of Aluminum Coated with SiO_2 by Sol-Gel Coating : Formation of New Type Anodic Oxide Film with High Voltage Sustainability
WATANABE Keiji, SAKAIRI Masatoshi, TAKAHASHI Hideaki, HIRAI Shinji
Journal of The Surface Finishing Society of Japan, 54, 3, 235, 240, 一般社団法人 表面技術協会, Mar. 2003, [Peer-reviewed]
Japanese, Scientific journal, Aluminum specimens were covered with SiO2 film by a sol-gel coating and then anodized galvanostatically in a boric acid solution. Time variations in the anode potential during anodizing were monitored, and the structure and dielectric properties of anodic oxide films were examined by TEM-EDX, and electrochemical impedance measurements. It was found that anodizing of aluminum coated with SiO2 films leads to the formation of anodic oxide films that consist of an outer Al-Si composite oxide layer and an inner Al2O3 layer at the interface between the SiO2 film and the metal substrate. The break...

Fabrication of Micro-Printed Circuit Board by Aluminum Anodizing and Laser Irradiation : Influence of Thickness of Oxide Film on Formation of Pattern
KIKUCHI Tatsuya, SAKAIRI Masatoshi, TAKAHASHI Hideaki, ABE Yoshihiko, KATAYAMA Naoki
Journal of The Surface Finishing Society of Japan, 54, 2, 137, 144, 一般社団法人 表面技術協会, Feb. 2003, [Peer-reviewed]
Japanese, Scientific journal, An aluminum specimen covered with porous type oxide films with 3 to 54μm thickness was irradiated by a pulsed Nd-YAG laser through a convex lens with 20 mm focal length in a solution to examine the mode of oxide film removal by laser irradiation. A prototype printed circuit board was fabricated using laser irradiation and Au electroplating. Thin oxide films were removed instantaneously after laser irradiation onset by the laser ablation mechanism. Thick oxide films were destructed initially from the upper part of the oxide films by the thermal shock mechanism, and then by the laser ablation...

Initial stage of localized corrosion on Zn - 5 mass% Al alloy coated steels by pulsed photon film removal technique　　　　　　　　　　　　　　　
Masatoshi Sakairi, Kazuma Itabashi, Hideaki Takahashi
Journal of Corrosion Science and Engineering, 6, 2003
English, International conference proceedings

Novel micro-patterning of aluminum surface by anodizing and AFM processing
Zenta Kato, Masatoshi Sakairi, Hideaki Takahashi
Zairyo to Kankyo/ Corrosion Engineering, 52, 1, 12, 17, Japan Society of Corrosion Engineering, 2003, [Peer-reviewed]
Japanese, Scientific journal

Rise of Breakdown Potential of Anodic Oxide Film on Aluminum by Pore-Filling Method
SHIMADA Hideki, SAKAIRI Masatoshi, TAKAHASHI Hideaki
Journal of the Surface Finishing Society of Japan, 53, 2, 142, 148, 社団法人 表面技術協会, Feb. 2002, [Peer-reviewed]
Japanese, Scientific journal, Aluminum covered with porous anodic oxide films was re-anodized in 0.5 kmolm-3-H3BO3 and 5×10-5kmolm-3-KOH solutions to examine the formation and breakdown of the oxide film.In H3BO3-solution, the pores were filled with new oxide during re-anodizing, resulting in the uniform thickening of the barrier layer until film breakdown started. The breakdown potential of the film formed by the “pore-filling” method was 200V higher at maximum than that formed by anodizing after electropolishing.In KOH solution, the pore-filling with new oxide was accompanied by local dissolution of oxide film, leadin...

Formation of Anodic Oxide Films on Aluminum in Diluted KOH Solutions
SHIMADA Hideki, SAKAIRI Masatoshi, TAKAHASHI Hideaki
Journal of the Surface Finishing Society of Japan, 53, 2, 134, 141, 社団法人 表面技術協会, Feb. 2002, [Peer-reviewed]
Japanese, Scientific journal, Aluminum was anodized in diluted KOH solutions galvanostatically to examine the effect of KOH-concentration on the growth and breakdown of anodic oxide films. Time-variations in the anode potential, Ea, the amount of dissolved Al3+ ions, and electroluminescence intensity were measured during anodizing, and the film structure was observed by transmission electron microscopy and scanning electron microscopy.At 5×10-5 and 5×10-4M, Ea increased with time linearly at the initial stage, and the rate of increase in Ea decreased at 400V. The slow increase in Ea stopped at about 600V, and beyond the...

Fabrication of grooves on aluminum surface with atomic force microscope probe processing
Z Kato, M Sakairi, H Takahashi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 148, 12, C790, C798, Dec. 2001, [Peer-reviewed]
English, Scientific journal

Fabrication of micropores and grooves on aluminum by laser irradiation and electrochemical technique
T Kikuchi, M Sakairi, H Takahasi, Y Abe, N Katayama
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 148, 11, C740, C745, Nov. 2001, [Peer-reviewed]
English, Scientific journal

Anodizing of aluminum coated with silicon oxide by a sol-gel method
K Watanabe, M Sakairi, H Takahashi, K Takahiro, S Nagata, S Hirai
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 148, 11, B473, B481, Nov. 2001, [Peer-reviewed]
English, Scientific journal

Fabrication of New Type Plastic Injection Mold by Anodizing, Laser Irradiation and Ni-P Electroless Plating
SAKAIRI Masatoshi, MOON Sungmo, TAKAHASHI Hideaki, SHIMAMURA Kiyotaka
Journal of the Surface Finishing Society of Japan, 52, 8, 553, 556, 社団法人 表面技術協会, Aug. 2001, [Peer-reviewed]
Japanese, Scientific journal

Micro-Technology on Aluminum Surface with Anodizing, Laser Irradiation, and Electrochemical Technique
KIKUCHI Tatsuya, SAKAIRI Masatoshi, TAKAHASHI Hideaki
Journal of the Surface Finishing Society of Japan, 52, 1, 84, 85, 社団法人 表面技術協会, Jan. 2001, [Peer-reviewed]
Japanese, Scientific journal

Confocal scanning laser microscopy of the surface of anodized A15052 alloy
SM Moon, M Sakairi, H Takahashi
CORROSION AND CORROSION PROTECTION, 2001, 22, 91, 98, 2001, [Peer-reviewed]
English, International conference proceedings

Effect of mechanical, chemical, and thermal treatments on the repairing of voids in re-anodizing of aluminum covered with composite oxide films
H Takahashi, Y Tamura, M Sakairi, H Uchi
CORROSION AND CORROSION PROTECTION, 2001, 22, 50, 57, 2001, [Peer-reviewed]
English, International conference proceedings

Anodizing of aluminum covered with SiO2 by sol-gel coating - Formation mechanism of composite oxide films with high potential sustainability
K Watanabe, M Sakairi, H Takahashi, S Hirai, S Nagata
CORROSION AND CORROSION PROTECTION, 2001, 22, 146, 153, 2001, [Peer-reviewed]
English, International conference proceedings

Anodizing of Aluminum Covered with SiO2 by Sol-Gel Coating -Formation Mechanism of Composite Oxide Films with High Potential Sustainability-　　　　　　　　　　　　　　　
K.Watanabe, M.Sakairi, H.Takahashi, S.Nagata, S.Hirai
Proceedings of the ECS&ISE Joint International Meeting, 420, 425, 2001, [Peer-reviewed]
English

Laser-assisted electroless Ni-P deposition at selected areas on Al (-Mg, Si, Cu) alloys
SZ Chu, M Sakairi, H Takahashi, K Simamura, K Abe
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 147, 6, 2181, 2189, Jun. 2000, [Peer-reviewed]
English, Scientific journal

In situ AFM Observation of Growth of Anodic Oxide Films on Aluminm-Mechanism for Flattening of the Film Surface-
TAKASHIMA Fusao, MIWA Koji, SAKAIRI Masatoshi, TAKAHASHI Hideaki
Journal of the Surface Finishing Society of Japan, 51, 6, 625, 632, 一般社団法人 表面技術協会, Jun. 2000, [Peer-reviewed]
Japanese, Scientific journal, Two kinds of alminum specimens were prepared: 1) chemically polished specimen (CP-specimen) and 2) surface-roughened specimen (PD-specimen) obtained by removing a porous anodic oxide film through dissolution in an H3PO4/CrO3 solution. The change in the surface roughness of CP- and PD-specimens during anodizing in a neutral solution was monitored with in situ atomic force microscopy (AFM) and transmission electron microscopy (TEM) as a function of anode potential. The change in surface roughness was also simulated mathematically, by assuming the Pilling-Bedworth ratio is constant during film...

Copper electroless plating at selected areas on aluminum with pulsed Nd-YAG laser
SZ Chu, M Sakairi, H Takahashi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 147, 4, 1423, 1434, Apr. 2000, [Peer-reviewed]
English, Scientific journal

Novel techniques of surface modification and processing based on anodizing of aluminum for the creation of functional surface
Hideaki Takahashi, Masatoshi Sakairi, S. Z. Chu, Keiji Watanabe, Tatsuya Kikuchi, Koji Miwa, Zenta Kato, Sanae Jonishi
Keikinzoku/Journal of Japan Institute of Light Metals, 50, 11, 544, 551, Japan Institute of Light Metals, 2000, [Peer-reviewed]
Japanese, Scientific journal

Formation of Al-(Zr,Si) Composite Oxide Films on Aluminum by Sol-Gel Coating/Anodizing　　　　　　　　　　　　　　　
K.Watanabe, M.Sakairi, H.Takahashi, K.Takahiro, S.Nagata, S.Hirai
Proc.2nd Inter.Symp.on Aluminum Surf.Sci.and Tech.(ASST2000), 420, 425, 2000, [Peer-reviewed]
English

Anodizing of aluminum coated with zirconium oxide by a sol-gel process I. Effect of heat treatment on the formation of the anodic oxide film
K Watanabe, M Sakairi, H Takahashi, K Takahiro, S Nagata, S Hirai
ELECTROCHEMISTRY, 67, 12, 1243, 1248, Dec. 1999, [Peer-reviewed]
English, Scientific journal

Formation of Al-Zr composite oxide films on aluminum by sol-gel coating and anodizing
K Watanabe, M Sakairi, H Takahashi, S Hirai, S Yamaguchi
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 473, 1-2, 250, 255, Sep. 1999, [Peer-reviewed]
English, Scientific journal

Fabrication of Micro-Circuit Board via Anodizing Aluminum, Laser Irradiation and Electrodeposition
KIKUCHI Tatsuya, SAKAIRI Masatoshi, TAKAHASHI Hideaki, ABE Yoshihiko, KATAYAMA Naoki
Journal of the Surface Finishing Society of Japan, 50, 9, 829, 835, 一般社団法人 表面技術協会, Sep. 1999, [Peer-reviewed]
Japanese, Scientific journal, Fine-pattern coils were fabricated on an insulating board using anodizing, laser irradiation, nickel deposition, insulating board sticking, and aluminum substrate dissolution. Aluminum specimens covered with porous anodic oxide films were irradiated by a pulsed Nd-YAG laser through a beam splitter, iris diaphragm, convex lens, and quartz window in a nickel electroplating solution to remove anodic oxide film. During laser irradiation, the specimen was moved 3-dimensionally with an XYZ stage by a personal computer.The width of the trench produced by film removal increased with increasing lase...

Nucleation of metals on aluminum by laser irradiation and the effect on Ni-P electroless deposition
SZ Chu, M Sakairi, Saeki, I, H Takahashi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 146, 8, 2876, 2885, Aug. 1999, [Peer-reviewed]
English, Scientific journal

Fabrication of Metal Micro-structure with Anodizing of Aluminum and Laser Irradiation - For Development of Nobel LIGA Process -
KIKUCHI Tatsuya, CHU Song zhu, KATO Zenta, SAKAIRI Masatoshi, TAKAHASHI Hideaki
Journal of the Surface Finishing Society of Japan, 50, 8, 697, 704, 一般社団法人 表面技術協会, Aug. 1999, [Peer-reviewed]
Japanese, Scientific journal

Anodizing of Alumiun Coated with Zirconium Oxide by Sol-Gel Coating
WATANABE Keiji, SAKAIRI Masatoshi, TAKAHASHI Hideaki, HIRAI Shinji, YAMAGUCHI Sadae
Journal of the Surface Finishing Society of Japan, 50, 4, 359, 366, 一般社団法人 表面技術協会, Apr. 1999, [Peer-reviewed]
Japanese, Scientific journal, Aluminum specimens were covered with zirconium oxide film by a sol-gel coating and galvanostatically anodized in a neutral borate solution. The time variation in anode potential during anodizing was monitored, and the structure and dielectric properties of the anodic oxide film were studied by TEM, EDX, RBS, and impedance measurement.We found that the anode potential increases with time, and that the slope of the potential-time curve increases with increasing the numbers of sol-gel dip coatings. During anodizing, an anodic oxide film, which consisted of an inner Al2O3 layer and an outer Al-...

Local deposition of Ni-P alloy on aluminum by laser irradiation and electroless plating
SZ Chu, M Sakairi, H Takahashi, ZX Qiu
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 146, 2, 537, 546, Feb. 1999, [Peer-reviewed]
English, Scientific journal

Effect of benzotriazole on anodizing of 2024 aluminum alloy in sulfuric acid at low temperature
M Sakairi, P Skeldon, GE Thompson, GC Wood, K Stevens
PASSIVITY AND LOCALIZED CORROSION, 99, 27, 171, 180, 1999, [Peer-reviewed]
English, International conference proceedings

Reformation of anodic oxide films on aluminum after destruction with laser irradiation in solutions. Effects of anion and pH
H Takahashi, M Sakairi, Y Ohira
PASSIVITY AND LOCALIZED CORROSION, 99, 27, 377, 386, 1999, [Peer-reviewed]
English, International conference proceedings

Patterning of Aluminum Surface with Laser Irradiation and Nickel Electrodeposition, II. Local Nickel Deposition at Laser Irradiated Area and Patterning with Fine Ni-Lines
SAKAIRI Masatoshi, WAKABAYASHI Jun, TAKAHASHI Hideaki, ABE Yoshihiko, KATAYAMA Naoki
Journal of the Surface Finishing Society of Japan, 49, 11, 1227, 1232, 一般社団法人 表面技術協会, Nov. 1998, [Peer-reviewed]
Japanese, Scientific journal, Fabrication of fine pattern on an aluminum surface with pulsed YAG laser irradiation and subsequent nickel plating has been reported in two consecutive papers. The second paper studies nickel deposition on aluminum irradiated with a pulsed YAG laser, and pattern fabrication with nickel deposition.Aluminum specimens covered with porous anodic oxide film were irradiated with a pulsed YAG laser in air and in Ni2+ ion solutions using a three dimensional stage controlled by computer, and then nickel was electrodeposited and studied potentiostatically as functions of cathode potential, Ec, Ni2+ i...

Patterning of Aluminum Surface with Laser Irradiation and Nickel Electrodeposition, I. Removal of Anodic Oxide Films by Laser Irradiation
SAKAIRI Masatoshi, WAKABAYASHI Jun, TAKAHASHI Hideaki, ABE Yoshihiko, KATAYAMA Naoki
Journal of the Surface Finishing Society of Japan, 49, 11, 1220, 1226, 一般社団法人 表面技術協会, Nov. 1998, [Peer-reviewed]
Japanese, Scientific journal, Fabrication of fine pattern on an aluminum surface with pulsed YAG laser irradiation and subsequent nickel plating has been reported in two consecutive papers. The first paper studies anodic oxide film removal from aluminum by laser irradiation.Aluminum specimens covered with porous anodic oxide films were irradiated with one YAG laser pulse in air and in Ni2+ ion solutions to examine the effect of laser power, P, defocusing distance, Δx, and irradiation atmosphere on the size of film removed area.Anodic oxide films were thoroughly removed by laser irradiation at P>2mW in both air and a sol...

Reformation of anodic oxide films on aluminum after destruction by pulsed Nd-YAG laser irradiation
M Sakairi, Y Ohira, H Takahashi
PROCEEDINGS OF THE SYMPOSIUM ON PASSIVITY AND ITS BREAKDOWN, 97, 26, 643, 653, 1998, [Peer-reviewed]
English, International conference proceedings

Formation of Al/(Ti, Nb, Ta)-composite oxide films on aluminum by pore filling
M Shikanai, M Sakairi, H Takahashi, M Seo, K Takahiro, S Nagata, S Yamaguchi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 144, 8, 2756, 2766, Aug. 1997, [Peer-reviewed]
English, Scientific journal

Noise reduction .1. For electrochemical measurement system
M Sakairi, H Takahashi
DENKI KAGAKU, 65, 5, 359, 364, May 1997, [Peer-reviewed]
Japanese, Scientific journal

Formation and breakdown of anodic oxide films on aluminum in boric acid borate solutions
Y Li, H Shimada, M Sakairi, K Shigyo, H Takahashi, M Seo
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 144, 3, 866, 876, Mar. 1997, [Peer-reviewed]
English, Scientific journal

Influence of Sulfide Inclusions on the Pit Embryo of Stainless Steels
Masatoshi Sakairi, Atsushi Nishikata, Tooru Tsuru
Zairyo-to-Kankyo, 40, 3, 183, 187, 1991, [Peer-reviewed]
English, Scientific journal

Effect of potential and chloride ion concentration on pit embryo life time.
SAKAIRI Masatoshi, TSURU Tooru
Jitsumu Hyomen Gijutsu, 41, 9, 940, 941, The Surface Finishing Society of Japan, Sep. 1990, [Peer-reviewed]
English, Scientific journal

Statistical analysis of current fluctuations during pit embryos formation on stainless steel　　　　　　　　　　　　　　　
Tooru Tsuru, Masatoshi Sakairi
Corrosion engineering, 39, 7, 401, 409, 1990
English, Scientific journal

Spectrum analysis of current fluctuations upon pit generation　　　　　　　　　　　　　　　
Tooru Tsuru, Masatoshi Sakairi
Corrosion engineering, 39, 8, 447, 454, 1990
English, Scientific journal

Statistical analysis on the current fluctuations during pit embryos formation on stainless steel
Tooru Tsuru, Masatoshi Sakairi
Boshoku gijutsu, 39, 7, 355, 360, 1990, [Peer-reviewed]
Japanese, Scientific journal

Spectrum analysis of current fluctuations on pitting corrosion. On a simulation and power spectrum
Tooru Tsuru, Masatoshi Sakairi
Boshoku gijutsu, 39, 8, 403, 408, 1990, [Peer-reviewed]
Japanese, Scientific journal

THE BREAKDOWN AND REPASSIVATION OF PASSIVE FILMS ON IRON WHISKER AND AMORPHOUS-ALLOYS
T TSURU, M SAKAIRI
CORROSION SCIENCE, 31, 361, 366, 1990, [Peer-reviewed]
English, Scientific journal

Promoting CO₂ Fixation for Reinforced Concrete Using Amine
齊藤亮介, 矢野慧一, 依田侑也, 辻埜真人, 西田朗, ELAKNESWARAN Yogarajah, 仙北久典, 坂入正敏, 伏見公志, 北垣亮馬, 清水建設研究報告, 101, 2023

やさしい腐食防食の基礎 第10回 腐食に伴う水素吸収・脆化　　　　　　　　　　　　　　　
坂入正敏, アグネ 金属, 92, 8, 89, 98, Aug. 2022, [Invited], [Lead author]
Japanese, Introduction scientific journal

やさしい腐食防食の基礎 第5回 腐食生成物の検定・同定　　　　　　　　　　　　　　　
大塚俊明, 坂入正敏, アグネ 金属, 92, 3, 1, 14, Mar. 2022, [Invited]
Japanese, Introduction scientific journal

金属カチオンによる鉄鋼材料の電気化学特性変化　　　　　　　　　　　　　　　
坂入正敏, 坂ノ上聡志, 防錆管理, 65, 9, 349, 353, Sep. 2021, [Peer-reviewed], [Invited], [Lead author]
Japanese, Introduction scientific journal

水膜中の酸素拡散に及ぼす温度勾配と水膜組成の影響　　　　　　　　　　　　　　　
谷口雅也, 坂入正敏, 防錆管理, 65, 9, 349, 353, Jun. 2021, [Peer-reviewed], [Invited]
Japanese, Introduction scientific journal

気象データと飛来海塩を考慮した大気腐食計算モデルの開発　　　　　　　　　　　　　　　
五十嵐誉廣, 小松篤史, 加藤千明, 坂入正敏, 防錆管理, 2021, [Invited]
Japanese, Introduction scientific journal

Ti-Al系マイクロチャンネル内壁での陽極酸化反応に及ぼす電解液流動の影響　　　　　　　　　　　　　　　
大参達也, 松岡佑輝, 坂入正敏, 日本金属学会講演概要集（CD-ROM）, 162th, RONBUNNO.337, Mar. 2018
Japanese, Summary national conference

NF43「寒冷地における腐食モニタリング」活動報告
坂入正敏, 大塚俊明, 安住和久, 伏見公志, 佐伯功, 境昌宏, 西本健太, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2016, 25, 01 Jul. 2016
Japanese

Preface to the Special Issue on "Creation of Hydrogen-passive Surfaces on Steels to Prevent of Hydrogen Embrittlement"
Masatoshi Sakairi, ISIJ INTERNATIONAL, 56, 3, 377, 377, 2016
English, Others

Ti-Al系マイクロチャンネル内壁での陽極酸化皮膜の組織形態に及ぼすライニング層組成の影響　　　　　　　　　　　　　　　
山森樹, 大参達也, 坂入正敏, 岩井一彦, 材料とプロセス（CD-ROM）, 28, 2, RONBUNNO.S026, Sep. 2015
Japanese, Summary national conference

Ti-Al系マイクロチャンネル内壁の陽極酸化皮膜組織に及ぼす電解液流動の影響　　　　　　　　　　　　　　　
松岡佑輝, 大参達也, 坂入正敏, 石田真士, 岩井一彦, 材料とプロセス（CD-ROM）, 28, 1, RONBUNNO.S060, Mar. 2015
Japanese, Summary national conference

Analysis of passive film structure formed on steels which is effect on corrosion behavior
坂入 正敏, 安部 雅俊, Subrim Ningshen, 材料とプロセス 日本鉄鋼協会 編, 26, 2, 668, 671, 17 Sep. 2013
日本鉄鋼協会, Japanese

Sf‐MDCによるアルミニウムの局部陽極酸化―白金対極被覆による皮膜成長挙動への影響―
山口智也, 坂入正敏, 伏見公志, 表面技術協会講演大会講演要旨集, 128th, 157, 10 Sep. 2013
Japanese

Sf‐MDC電極の被覆による電気化学反応面積の変化
山口智也, 坂入正敏, 伏見公志, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2013, 5, 26 Jul. 2013
Japanese

PWR一次系でのニッケル基合金上の酸化物皮膜の形状と組成
大塚俊明, 濱口祐香, 坂入正敏, 伏見公志, 榊原洋平, 中山元, 材料と環境講演集, 2013, 79, 82, 30 Apr. 2013
Japanese

Al局部陽極酸化サイズに及ぼすSf‐MDC電極形状の影響
山口智也, 坂入正敏, 伏見公志, 表面技術協会講演大会講演要旨集, 127th, 188, 06 Mar. 2013
Japanese

Formation of area and thickness controlled porous type aluminum anodic oxide films by Sf-MDC
M. Sakairi, T. Yamaguchi, T. Murata, K. Fushimi, ECS Transactions, 50, 255, 262, 01 Dec. 2012

Sf‐MDCによる局部アルミニウム多孔質型酸化皮膜の形成
山口智也, 坂入正敏, 伏見公志, 表面技術協会講演大会講演要旨集, 126th, 64, 12 Sep. 2012
Japanese

過塩素酸系と酢酸緩衝系水溶液におけるNi上へのPb UPDの相違について
瀬尾眞浩, 伏見公志, 坂入正敏, 幅崎浩樹, 中山武典, 材料と環境討論会講演集, 59th, 183, 184, 10 Sep. 2012
Japanese

Al-Zn系マイクロチャンネル内壁のリン酸溶液中でのアノード酸化　　　　　　　　　　　　　　　
石田真士, 大参達也, 坂入正敏, 岩井一彦, 材料とプロセス(CD-ROM), 26, 1, ROMBUNNO.60, Sep. 2012
Japanese, Summary national conference

How to Transmission Knowledge of Corrosion and Protection to Next Generation
SAKAIRI Masatoshi, 材料と環境 : zairyo-to-kankyo, 61, 7, 261, 262, 15 Jul. 2012
Japanese

PWR環境に曝露したニッケル基合金の表面酸化物皮膜
濱口祐香, 兵野篤, 大塚俊明, 坂入正敏, 伏見公志, 中山元, 榊原洋平, 材料と環境講演集, 2012, 113, 116, 11 Apr. 2012
Japanese

犠牲コア法を用いて作製した平板状ライニング層のアノード酸化
石田真士, 大参達也, 坂入正敏, 井口学, 日本金属学会講演概要(CD-ROM), 150th, ROMBUNNO.469, 15 Mar. 2012
Japanese

定電位溶解によるCu‐Zn系マイクロチャンネルライニング層の組織変化
小林和貴, 大参達也, 熊谷剛彦, 坂入正敏, 井口学, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2011, 24, 19 Jan. 2012
Japanese

アルカリリーチング処理によるNi‐Al系マイクロチャンネルライニング層の組織変化
斉藤祐介, 大参達也, 坂入正敏, 熊谷剛彦, 井口学, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2011, 25, 19 Jan. 2012
Japanese

Sf‐MDCを用いるアルミニウムの局部陽極酸化とその応用
坂入正敏, 村田拓哉, 伏見公志, 菊地竜也, 日本金属学会講演概要(CD-ROM), 149th, ROMBUNNO.526, 20 Oct. 2011
Japanese

チタン‐アルミニウム系マイクロチャンネル内壁へのナノポーラス陽極酸化皮膜の形成
大参達也, 石田真士, 坂入正敏, 井口学, 軽金属, 61, 7, 376, 30 Jul. 2011
Japanese

Report of Corrosion Dream 2010
SAKAIRI Masatoshi, 材料と環境 : zairyo-to-kankyo, 60, 5, 223, 223, 15 May 2011
Japanese

アルミニウムの局部陽極酸化へのSf‐MDCの適用
坂入正敏, 村田拓哉, 伏見公志, 菊地竜也, 日本金属学会講演概要, 148th, 322, 20 Apr. 2011
Japanese

Sf‐MDCを用いるアルミニウム上への厚い局部陽極酸化皮膜の形成
坂入正敏, 村田拓哉, 菊地竜也, 伏見公志, 電気化学会大会講演要旨集, 78th(CD-ROM), ROMBUNNO.1H27, 29 Mar. 2011
Japanese

SF‐MDCを用いるAl上への局部アノード酸化皮膜の形成
村田拓哉, 坂入正敏, 菊地竜也, 伏見公志, 化学系学協会北海道支部冬季研究発表会講演要旨集, 2011, 94, 01 Feb. 2011
Japanese

アノード酸化皮膜のマイクロ・ナノテクノロジー　　　　　　　　　　　　　　　
菊地竜也, 坂入正敏, 高橋英明, 軽金属, 61, 373, 2011, [Invited]
Japanese, Introduction scientific journal

アルミニウムの多孔質型局部陽極酸化に及ぼす基板温度の影響
坂入正敏, 村田拓哉, 伏見公志, 菊地竜也, 日本金属学会講演概要, 147th, 412, 25 Sep. 2010
Japanese

SF‐MDCを用いるアルミニウム上への局部ポーラス型酸化物皮膜の形成
村田拓哉, 坂入正敏, 菊地竜也, 伏見公志, 電気化学秋季大会講演要旨集, 2010, 68, 02 Sep. 2010
Japanese

8th Spring Meeting of the International Society of Electrochemistry
SAKAIRI Masatoshi, 材料と環境 : zairyo-to-kankyo, 59, 7, 255, 256, 15 Jul. 2010
Japanese

溶液フロー型微小液滴セルを用いるアルミニウム上へのライン状アノード酸化
村田拓哉, 坂入正敏, 菊地竜也, 伏見公志, 日本化学会北海道支部夏季研究発表会講演要旨集, 2010, 44, 25 Jun. 2010
Japanese

溶液フロー型微小液滴セルを用いる金属表面へのパターン作製
村田拓哉, 坂入正敏, 菊地竜也, 伏見公志, 電気化学会大会講演要旨集, 77th, 318, 26 Mar. 2010
Japanese

溶液フロー型微小液滴セルを用いる模擬金属界面の電気化学測定
坂入正敏, 村田拓哉, 伏見公志, 材料とプロセス(CD-ROM), 23, 1, ROMBUNNO.299, 01 Mar. 2010
Japanese

溶液フロー型液滴セルによるAlの局部陽極酸化
後藤良仁, 坂入正敏, 菊地竜也, 伏見公志, 表面技術協会講演大会講演要旨集, 121st, 232, 26 Feb. 2010
Japanese

溶液フロー型液滴セルを用いる金属表面上の局部電気化学測定
村田拓哉, 坂入正敏, 菊地竜也, 伏見公志, 化学系学協会北海道支部冬季研究発表会講演要旨集, 2010, 14, 26 Jan. 2010
Japanese

溶液フロー型微小液滴セルによるアルミニウム上への局部陽極酸化の試み
後藤良仁, 坂入正敏, 菊地竜也, 伏見公志, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2009, 30, 21 Jan. 2010
Japanese

管状パッシブ型水素吸放出システムの熱移動・水素吸放出特性評価に関する研究
白土博康, 濱田靖弘, 須田孝徳, 坂入正敏, 岡喜秋, 池田英明, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集, 44th, 2010

溶液フロー型液滴セルによる微細加工―電極間距離の影響―
村田拓哉, 坂入正敏, 菊地竜也, 伏見公志, 電気化学秋季大会講演要旨集, 2009, 230, 10 Sep. 2009
Japanese

改良型SF‐MDCによる絶縁体基板上へのめっきパターンの形成
後藤良仁, 坂入正敏, 菊地竜也, 伏見公志, 表面技術協会講演大会講演要旨集, 120th, 29, 07 Sep. 2009
Japanese

Effect of PWHT on electrochemical behavior of LOW C - 13%Cr welded joints with the use of a solution flow type micro-droplet cell
Shuji Hashizume, T. Nakayama, M. Sakairi, K. Fushimi, NACE - International Corrosion Conference Series, 31 Aug. 2009

溶液フロー型液滴セルによる金属表面の微細加工
村田拓哉, 坂入正敏, 菊地竜也, 伏見公志, 日本化学会北海道支部夏季研究発表会講演要旨集, 2009, 78, 26 Jun. 2009
Japanese

溶液フロー型液滴セルによる鉄電極の局部溶解挙動
村田拓哉, 坂入正敏, 菊地竜也, 伏見公志, 電気化学会大会講演要旨集, 76th, 89, 29 Mar. 2009
Japanese

改良型SF‐MDCによるマイクロCuロッドの作製
後藤良仁, 菊地竜也, 坂入正敏, 伏見公志, 表面技術協会講演大会講演要旨集, 119th, 198, 199, 02 Mar. 2009
Japanese

溶液フロー型微小液滴セルの改良とその電気化学特性
坂入正敏, 村田拓哉, 伏見公志, 材料とプロセス(CD-ROM), 22, 1, ROMBUNNO.281, 01 Mar. 2009
Japanese

溶液フロー型微小液滴セルによる構造体作製に及ぼす印加電流の影響
後藤良仁, 菊地竜也, 坂入正敏, 伏見公志, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2008, 39, 16 Jan. 2009
Japanese

溶液フロー型微小液滴セルによる局部めっき成長挙動の観察
後藤良仁, 坂入正敏, 菊地竜也, 伏見公志, 日本金属学会日本鉄鋼協会両支部合同夏季講演大会概要集, 2008, 9, 10 Jul. 2008
Japanese

溶液フロー型微小液滴セルの電気化学特性
坂入正敏, 中山俊弥, 後藤良仁, 伏見公志, 材料とプロセス(CD-ROM), 21, 1, ROMBUNNO.S212, 01 Mar. 2008
Japanese

溶液フロー型微小液滴セルによる3次元めっき法の開発
後藤良仁, 坂入正敏, 伏見公志, 表面技術協会講演大会講演要旨集, 117th, 238, 239, 29 Feb. 2008
Japanese

ステンレス鋼HAZの応力負荷状態における電気化学的挙動測定
中山俊弥, 坂入正敏, 伏見公志, 橋爪修司, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2007, 38, 11 Jan. 2008
Japanese

溶液フロー型微小液滴セルに用いる局部電気化学
坂入正敏, 佐藤文人, 中山俊弥, 伏見公志, 電気化学秋季大会講演要旨集, 2007, 30, 19 Sep. 2007
Japanese

溶液フロー型液滴セルを用いるステンレス鋼溶接材熱影響部の電気化学測定
中山俊弥, 坂入正敏, 伏見公志, 橋爪修司, 材料と環境講演集, 2007, 125, 126, 25 Apr. 2007
Japanese

溶液フロー型微小液滴セルによるマスクレス局部めっきの試み
坂入正敏, 佐藤文人, 伏見公志, 表面技術協会講演大会講演要旨集, 115th, 131, 132, 22 Feb. 2007
Japanese

微小液滴セルによるステンレス鋼溶接材各部の電流測定
中山俊弥, 坂入正敏, 伏見公志, 橋爪修司, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2006, 42, 10 Jan. 2007
Japanese

溶液フロー型微小液滴セルによる溶接材の局部電気化学測定
中山俊弥, 坂入正敏, 伏見公志, 橋爪修司, 材料と環境討論会講演集, 53rd, 361, 362, 15 Sep. 2006
Japanese

フロー型微小液滴セルを用いる局部表面めっき
佐藤文人, 坂入正敏, 伏見公志, 材料と環境討論会講演集, 53rd, 415, 416, 15 Sep. 2006
Japanese

電気化学微小液滴セルによる局部ニッケルめっき
佐藤文人, 坂入正敏, 伏見公志, 日本化学会北海道支部研究発表会講演要旨集, 2006, 40, 20 Jul. 2006
Japanese

微小液滴セルを用いたステンレス鋼溶接材の電位分布測定
中山俊弥, 坂入正敏, 伏見公志, 橋爪修司, 日本金属学会日本鉄鋼協会両支部合同夏季講演大会概要集, 2006, 26, 12 Jul. 2006
Japanese

Initial stage of localized corrosion in micro-pit formed by photon rupture on zinc alloy coated steels
SAKAIRI Masatoshi, 材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 18, 3, 575, 575, 01 Mar. 2005
Japanese

Micro-Fabrication on Aluminum Surfaces with AFM-probe
KATO Zenta, SAKAIRI Masatoshi, TAKAHASHI Hideaki, 大会講演概要, 107, 185, 186, 01 Nov. 2004
Japanese

Initial Stage of Localized Corrosion on Zinc Alloy Coated Steels by Photon Rupture Method
SAKAIRI Masatoshi, 材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 17, 6, 1148, 1148, 01 Sep. 2004
Japanese

Influence of current density on the structure and dielectric properties of anodic oxude films on niobium　　　　　　　　　　　　　　　
Nagahara K, Sakairi M, Takahashi H, Nagata S, Matsumoto K, Takayama K, Oda Y, Surfaace technology, 55, 12, 193, 201, 2004

Initial Stage of Localized Corrosion on Al-9mass% Si Coated Steels with Photon Rupture : Effect of Potential
SAKAIRI Masatoshi, 材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 16, 6, 1250, 1253, 01 Sep. 2003
Japanese

Three Dimensional Microstructure Fabrication with Aluminum Anodizing, Laser Irradiation, and Electrochemistry. T.Kikuchi, M.Sakairi, and H.Takahashi
KIKUCHI T, SAKAIRI M, TAKAHASHI H, J.Electrochem Soc., 150, 9, C567, C572, 2003

Initial Stage of Localized Corrosion of Zn-Al Alloy Coated Steel by Laser Depassivation in Aggressive Anion Containing Solutions
ITABASHI K., SAKAIRI M., TAKAHASHI H., 材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 15, 6, 1199, 1200, 01 Sep. 2002
English

Formation of A1/(Ti,Nb,Ta)-composite oxide films on aluminum by pore filling (vol 144, pg 2756, 1997)
M Shikanai, M Sakairi, H Takahashi, M Seo, K Takahiro, S Nagata, S Yamaguchi, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 145, 6, 2207, 2207, Jun. 1998
English, Others

Ishikawa Laboratory, Hokkaido University
SAKAIRI Masatoshi, 材料と環境 : zairyo-to-kankyo, 45, 5, 339, 340, 15 May 1996
Japanese

2020版・薄膜作製応用ハンドブック，權田俊一監修　　　　　　　　　　　　　　　
坂入正敏, 第２編第１章第１節 金属基板
株）エヌ・ティー・エス, 2020, [Joint work]

lectrochemistry for Corrosion Fundamentals　　　　　　　　　　　　　　　
SAKAIRI Masatoshi, Chapter 5 Hydrogen embrittlement and hydrogen absorption-
Springer Nature Singapore Pte Ltd., Jan. 2018, [Joint work]

電気化学便覧　　　　　　　　　　　　　　　
電気化学会, 5.15ノイズ対策
丸善, Dec. 2012, [Contributor]

Lasers - applications in science and industry　　　　　　　　　　　　　　　
Krzysztof Jakubcza, Chapter 9 Application of pulsed laser fabrication in localized corrosion research
InTec, 2011, [Contributor]

キャパシタ便覧　　　　　　　　　　　　　　　
8.1.1 複合酸化物皮膜の形成によるアルミニウム電解コンデンサーの大容量化
丸善, 2009, [Contributor]

Progress in corrosion research　　　　　　　　　　　　　　　
Emilio L. Bettini, Re-passivation and initial stage of localized corrosion of metals by using photon rupture technique and electrochemistry
Nova Science Publishers Inc., 2007, [Contributor]

Passivitiy of metals and semiconductors, and properties of thin oxide layers　　　　　　　　　　　　　　　
P. Marcus, V. Maurice, Formation of Al-Si composite oxide films on aluminum by electrophoretic sol-gel coating/anodizing
Elsevier B.V, 2006, [Contributor]

Passivitiy of metals and semiconductors, and properties of thin oxide layers,　　　　　　　　　　　　　　　
P. Marcus, V. Maurice, Passivitiy of metals and semiconductors, and properties of thin oxide layers, Initial stage of localized corrosion in artificial pit formed on zinc coated steels by photon rupture
Elsevier B.V., 2006, [Contributor]

水の分析 第５版、日本分析化学会北海道支部編　　　　　　　　　　　　　　　
化学同人, 2005

21世紀版・薄膜作製応用ハンドブック　　　　　　　　　　　　　　　
權田俊一監修, 第２編第１章第１節 金属基板
株）エヌ・ティー・エス, 2003, [Contributor]

各種金属材料の水溶液腐食に及ぼ金属カチオンと温度の影響　　　　　　　　　　　　　　　
坂入正敏
電気化学会第92回大会, 20 Mar. 2025, Japanese, Invited oral presentation
18 Mar. 2025 - 20 Mar. 2025, [Invited]

Atmospheric Corrosion of Metals in Cold and Snowy Region　　　　　　　　　　　　　　　
Masatoshi Sakairi
Prime2024, 10 Oct. 2024, English
06 Oct. 2024 - 11 Oct. 2024, [Invited]

低温環境における金属材料の腐食と電気化学計測　　　　　　　　　　　　　　　
坂入正敏
日本金属学会春期講演大会, 09 Mar. 2023, Japanese, Keynote oral presentation
[Invited]

Influence of metal cation on corrosion of metals in aqueous environments　　　　　　　　　　　　　　　
M. Sakairi
6th INTERNATIONAL CONFERENCE ON COMPUTER, COMMUNICATION, CHEMICAL, MATERIALS AND ELECTRONIC ENGINEERING (IC4ME2-2021), 26 Dec. 2021, English, Invited oral presentation
[Invited], [International presentation]

腐食劣化解析に基づく鋼構造物の最適な維持を目指して　　　　　　　　　　　　　　　
坂入正敏
スクベース設備管理第180委員会第2回研究会, 22 Dec. 2020, Japanese, Others
[Invited]

3Dプリンタにより作製したマルチチャンネル液滴セルによる局部陽極酸化　　　　　　　　　　　　　　　
坂入正敏, M. Bilal
第105回ARS例会(SURTECH), 31 Jan. 2020, Japanese, Public discourse
[Invited]

鉄鋼材料を長く，安全に使用するための研究　　　　　　　　　　　　　　　
坂入正敏
日本鉄鋼協会，最先端鉄鋼セミナー, 30 Aug. 2018, Japanese, Public discourse
[Invited]

微小電気化学セルを用いる局部陽極酸化　　　　　　　　　　　　　　　
坂入正敏
第98回ARS例会(SURTECH), 16 Feb. 2018, Japanese, Public discourse
[Invited]

Effect of Anodizing Conditions on Porous Alumina Formation at Selected area with Solution Flow type Micro-Droplet Cell　　　　　　　　　　　　　　　
SAKAIRI Masatoshi, MATSUMOTO Toshiyuki
TheInternational Symposium on Surface Treatment & Modification Technosogies (STMT2017), 23 Nov. 2017, English, Invited oral presentation
[Invited], [International presentation]

Application of solution flow type micro-droplet cell to form shape controlled porous alumina　　　　　　　　　　　　　　　
SAKAIRI Masatoshi, MATSUMOTO Toshiyuki
The 3rd Koria-Japan Joint Symposium for ARS & ESS, 26 Nov. 2016, English, Invited oral presentation
[Invited], [International presentation]

XPSと電気化学的手法を用いるいる金属の不働態皮膜構造の解析　　　　　　　　　　　　　　　
坂入 正敏, 大谷 恭平
日本分析化学会第65年会 Ｘ線分析研究懇談会, 16 Sep. 2016, Japanese, Invited oral presentation
[Domestic Conference]

Resent research progress in creation of hydrogen-passive surfaces on steels to prevent of hydrogen embrittlement　　　　　　　　　　　　　　　
SAKAIRI Masatoshi
Asian Steel 2015, 08 Oct. 2015, English, Invited oral presentation
[International presentation]

表面処理鋼板の腐食解析（水素脆性を中心に）　　　　　　　　　　　　　　　
坂入 正敏
日本鉄鋼協会 第223回・第224回西山記念技術講座, Oct. 2015, Japanese, Public discourse
[Invited], [Domestic Conference]

微小電気化学を用いる腐食と表面処理　　　　　　　　　　　　　　　
坂入 正敏
2015電気化学会秋季大会, 12 Sep. 2015, Japanese, Invited oral presentation
[Domestic Conference]

大気腐食反応に伴う水素発生・侵入の電気化学的検出と界面反応機構　　　　　　　　　　　　　　　
坂入 正敏, 五十嵐洸哉, 高木翔悟
日本金属学会2015年春期講演大会, 20 Mar. 2015, Japanese, Keynote oral presentation
[Domestic Conference]

Evaluation of metal cation effects on galvanic corrosion of aluminum alloys in low chloride ion containing solutions with electrochemical noise　　　　　　　　　　　　　　　
SAKAIRI Masatoshi
ICONS2014, 04 Feb. 2014, English, Invited oral presentation
[International presentation]

溶液フロー型液滴セルを用いる局部表面処理　　　　　　　　　　　　　　　
坂入 正敏
第126回表面技術協会講演大会, 27 Sep. 2012, Japanese, Invited oral presentation
[Domestic Conference]

Corrosion behavior of 11 mass% Cr F/M steel and 15 mass% Cr ODS steel in corrosive solutions　　　　　　　　　　　　　　　
M. Sakairi, S. Nigshen, K. Suzuki, S. Ukai
NIMS Confarence 2012, 05 Jun. 2012, English, Invited oral presentation
[Invited], [International presentation]

Simultaneous hydrogen and rest potential measurement during wet/dry corrosion at scratch on zinc coated steel　　　　　　　　　　　　　　　
M. Sakairi, S. Takagi
材料と環境2012国際セッション, 25 Apr. 2012, English, Invited oral presentation
[Invited], [Domestic Conference]

超薄切片法によるアノード酸化皮膜の微細構造　　　　　　　　　　　　　　　
坂入 正敏
（社）表面技術協会，第109回講演大会, Mar. 2004, Japanese, Invited oral presentation
[Invited], [Domestic Conference]

レーザー皮膜除去法による局部皮膜補修機構と局部表面処理　　　　　　　　　　　　　　　
坂入 正敏
（社）日本金属学会 2000年（第127回）秋期大会, Sep. 2000, Japanese, Invited oral presentation
[Invited], [Domestic Conference]

Development of electrochemical hydrogen absorption-permeation measurement for in-situ determination of trapped hydrogen and analysis of hydrogen embrittlement
Grants-in-Aid for Scientific Research
01 Apr. 2022 - 31 Mar. 2025
伏見 公志, 坂入 正敏, 宮本 浩一郎
省エネルギー材料として需要の高まる高強度鋼は機械的特性に優れるが、その水素脆化感受性が普通鋼に比べ高い。水素脆化リスクを低減させるため、その前駆過程である水素侵入現象について従来以上の精密な解析が要求されている。水素脆化を誘導する捕捉水素の役割を明らかにするため、本研究では電気化学的水素透過現象における侵入水素、非侵入水素、透過・捕捉水素を高精度にその場解析可能にする新規評価法を開発し、各種鋼材の水素侵入・捕捉量について定量を実現する。
昨年度、従来の電気化学的水素透過試験法であるDevanathan-Stachurskiセルにチャンネルフロー二重電極法を組み合わせた新しい電気化学測定装置を作製し、電気化学的水素透過測定における試料の水素侵入面および水素引出面、侵入室内の水素検出電極より得られる各電流値より、水素物質収支を解析するその場評価法を開発した。
本年度、弱酸性硫酸ナトリウム水溶液中、炭素鋼試料のカソード分極により侵入した試料内水素量の試料厚さおよび硬さに対する依存性を明らかにし、侵入面水素量および捕捉水素量を求めた。この侵入面水素量および捕捉水素量は試料硬さ、すなわちトラップ濃度に依存することを確認した。また、本電気化学測定装置をオンラインICP-OESに接続し、侵入室内の水素検出電極における鉄種の干渉の影響を除去できる改良を進めた。これにより
（鉄が自己溶解する）強酸性水溶液中においても、非侵入水素量を正しく見積もることができるようになった。硫酸水溶液中に浸漬するだけで鉄板には相当量の水素が侵入することがわかった。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 23K23090

Development of electrochemical hydrogen permeation measurement for in-situ determination of trapped hydrogen and analysis of hydrogen embrittlement
Grants-in-Aid for Scientific Research
01 Apr. 2022 - 31 Mar. 2025
伏見 公志, 坂入 正敏, 宮本 浩一郎
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 22H01822

TiO2 layer formation on super elastic NiTi alloy via anodization
Grants-in-Aid for Scientific Research
01 Apr. 2021 - 31 Mar. 2024
大津 直史, 太田 信, 坂入 正敏
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Kitami Institute of Technology, 21H01631

Formation of corrosion resistant surface on metals by means of metal cation assisted restoration of passive films
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Apr. 2021 - Mar. 2024
坂入 正敏, 大谷 恭平, 五十嵐 誉廣
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 21H01660

Fabrication of a bulk material composed of nano-sized layers accumulated by electro-deposition
Grants-in-Aid for Scientific Research
2011 - 2013
MIURA SEIJI, SAKAIRI Masatoshi
In order to fabricate a bulk material composed of nano-sized layers as a new kind of nano-materials, electro-depositing (plating) process is used. An equipment is developed to accumulate more than 100 layers by immersing into different solutions alternately to deposit different metallic layers such as copper and nickel. TEM and SEM are mainly used to investigate the microstructure of samples, and it was found that the layers are coherent each other. Many grain boundaries and twin boundaries are found in the layers, which may cause a fast diffusion of elements.
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, 23656443

核燃料再処理環境における金属材料の腐食と環境割れ
科学研究費助成事業
2011 - 2012
坂入 正敏, NINGSHEN Sublim, NINGSHEN Sublime
ステンレス鋼やチタン合金は、耐食性が高いため化学プラントから生体材料等の幅広い環境中で使用されている。しかし,環境が変化すると予想しない腐食が発生することがあり、その腐食挙動は十分に理解されているとは言い難い。特に,次世代高強度材料として期待されている,酸化物分散強化型(ODS)フェライトス鋼については,腐食挙動に関する知見が殆ど無い。
そこで、本年度はクロム濃度を変えて作製したODSフェライト鋼,オーステナイトステンレス鋼,チタン合金の硝酸環境中を中心に腐食挙動の調査を電気化学的手法と浸漬腐食試験により行うとともに,表面酸化物皮膜構造をXPSにより分析した。
12%-15%CrODS鋼の3Mから9Mの沸騰硝酸中の腐食挙動を浸漬試験により調査した。浸漬時間は,最長240時間とした。その結果,15%Cr ODS鋼の腐食速度は,0.02-0.24mm/年であり,304Lステンレス鋼の腐食速度は,0.02-016mm/年(浸漬初期)であった。ODS鋼は,240時間浸漬しても粒界腐食は観察されなかった。動電位分極曲線から求めた,腐食電位は硝酸濃度が高くなるに従って,貴側に変化した。XPSによる表面分析の結果から,ODS鋼とステンレス鋼の腐食挙動の違いは,不働態皮膜組成の違いによることを明らかにした。
JIS-2Tiとチタン合金,(Ti-0.4Ni-0.15Cr-0.01Pd-0.03Ru-Ta, KS50AKOT)の沸騰濃硝酸溶液中における腐食挙動を調査した。浸漬腐食時間は240時間とし,48時間毎に溶液を交換した。腐食速度は,JIS-2Tiで0.07mm/年,チタン合金で0.000763mm/年であった。
ODS鋼の硝酸環境中における使用の可能性を明らかにした。
日本学術振興会, 特別研究員奨励費, 北海道大学, 11F01069

Frontiers of Micro-and Nano-structure FabricationBased on the Anodizing of Valve Metals
Grants-in-Aid for Scientific Research
2007 - 2008
MASATOSHI Sakairi, KIKUCHI Tatsuya, TAKAHASHI Hideaki
本研究においては、電気化学的手法とレーザー照射を用いることにより、アルミニウムを中心とするバルブ金属表面にマイクロ・ナノ構造を構築し、新規な性質を付与する技術の開発を目的とした。高容量電解コンデンサーの試作、マイクロ・ナノ電子デバイスの作製および導電性高分子・無電解めっきを応用した新規表面処理法の開発を実現し、バルブ金属をエレクトロニクス・ナノテクノロジーの分野において利用するための新たな活用法を開拓することに成功した。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 19206078

レーザー照射/電気化学複合プロセスによる三次元マイクロアクチュエーターの試作
科学研究費助成事業
2004 - 2005
高橋 英明, 坂入 正敏
アルミニウムのアノード酸化・レーザー照射・電着塗装・導電性高分子析出の連続プロセスにより、アクリル樹脂/金/導電性ポリピロールの3層からなるマイクロアクチュエーターを試作した。このアクチュエーターを各種カチオンを含む水溶液中に浸漬し、アクチュエーターの動作挙動を観察したところ、1価および2価のカチオンを含む溶液においては、ポリピロールの膨張・収縮による試料の動作が観察されたが、3価のカチオンを含む溶液の場合には、試料は動作しなかった。また、カチオンの価数が大きくなると、アクチュエーターの移動距離が小さくなることがわかった。これは、カチオンの価数が大きくなると、ポリピロール膜中に取り込まれる水和カチオンの量が少なくなるためである。
これまでの研究成果を元に、三次元形状を有するアルミニウム試料を用いて、上述の連続プロセスにより三次元マイクロマニピュレーターを試作した。このマニピュレーターは、コイル状の微細構造体先端に4本の可動部を有する。試作したマイクロマニピュレーターをドデシルベンゼンスルホン酸ナトリウム水溶液中に浸漬したのち、あらかじめ水溶液中に浸漬したシリンダー状のセラミックス構造体をターゲットとしてマニピュレーターの性能を評価した。マニピュレーターの電位を-0.8Vから0V(銀塩化銀参照電極基準)に変化すると、4本の可動部がセラミックスを保持し、その後のマニピュレーターの移動により、セラミックス試料を移動させることができた。すなわち、このマイクロマニピュレーターを用いることにより、極めて微細なターゲット材料を任意の位置に移動できる。このような三次元マイクロマニピュレーターの実現は、世界でも初めての研究成果であり、今後の研究により、マイクロマシン分野や医療分野などに応用できるものと考えられる。
日本学術振興会, 萌芽研究, 北海道大学, 16656221

高輝度光微細加工による生体内物質分析用微小電気化学反応セル創製に関する研究
科学研究費助成事業
2003 - 2004
坂入 正敏, 石田 晃彦
本研究課題は、高輝度光(集光したパルスYAGレーザー照射)表面微細加工法と電気化学的手法により、酵素反応によって生体内で生成される過酸化水素などの、生体微量物質分析用微小電気化学セルをアルミニウム上に作製すること、さらに、対極などを取り付け微小電気化学分析システムにして、その性能を評価することを目的としている。
昨年度は、アルミニウムを用いてアノード酸化、レーザー加工、電気めっきを用いて、2電極型システムを作製でき、K_3Fe(CN)_6/K_4Fe(CN)_6の混合溶液(約1.5μl)を用いてCV測定を行ったところ、アノードピーク電流の走査速度依存性や濃度依存性を確認できたが、ピーク形状および液漏れの問題があった。そこで、本年度は、流路などの形状の改良および作製工程の改良を行い、より完成度の高い生体微量物質分析用微小電気化学セルの作製およびその電気化学的特性評価を行った。
微細溝および微細貫通孔には、レーザー照射後、再度アノード酸化することで、保護性の皮膜を形成し、電極部にはめっきにより金を析出させた。これら、再アノード酸化および金めっきにより、各種溶液で安定に動作可能な、理論内容量1.5μlの微小電気化学セルを作製できた。作製したセルを用いて、電気化学測定を行った結果、従来のマクロ電極と同様のサイクリックボルタモグラムが測定できた。すなわち、アノードピーク電流は電位走査速度の平方根に比例して増加し、その傾きから電極面積を見積もった結果、妥当な値を得ることができた。
日本学術振興会, 萌芽研究, 北海道大学, 15656177

Local Electrochemistry by Solution Flow Type Micro-droplet Cell　　　　　　　　　　　　　　　
2003
Localized electrochemical reaction studied by micr-droplet cell
Competitive research funding

レーザー照射/有機膜泳動電着による微細パターニングに関する研究
科学研究費助成事業
2001 - 2002
高橋 英明, 坂入 正敏
円筒状アルミニウム試料(直径2mm)をアノード酸化し、表面に多孔質酸化皮膜を形成したのち、これを蒸留水中に浸漬し、回転・上下動をさせながらパルスNd-YAGレーザーを照射してアノード酸化皮膜を局部的に破壊・除去した。レーザー照射試料をアクリル酸オリゴマーの溶液中に浸漬し、アノード分極することにより、アクリル樹脂が皮膜除去部のみに析出させた。その後、加熱処理により、脱水とアクリル樹脂の重合を促進した。
アクリル樹脂表面の親油性とアノード酸化皮膜表面の親水性とを利用し、微細円筒プリント原板としての可能性を調べた。すなわち、油性塗料をアクリル樹脂上に塗布し、紙の上を回転させることにより、円筒プリント原板上に描いたパターンを紙に転写させることを試みた結果、数十ミクロンの線幅のパターンを、うまく転写できることを見出した。
アクリル樹脂析出試料をNaOH溶液中に浸漬し、素地金属および酸化皮膜を溶解除去することにより、アクリル樹脂からなる円筒状かごを形成することに成功した。このかご状構造体は、細線を網目状に編んであるものではなく、一体構造であることが特徴である。すなわち、このアノード酸化/レーザー照射/泳動電着塗装の連続プロセスは、三次元微細有機構造体の新規作成法として注目される。
日本学術振興会, 萌芽研究, 北海道大学, 13875134

フォトンラプチャー法による局部皮膜再生機構の研究
科学研究費助成事業
2000 - 2001
坂入 正敏
本研究は、フォトンラプチャー法により、アノード酸化皮膜に覆われたアルミニウムおよびその合金の各種水溶液中の微小かつ瞬間的な皮膜の修復現象を解明しようとするものである。
本年度は、昨年度の結果を基に、アノード酸化したアルミニウム合金めっき層を各種溶液中においてフォトンラプチャー法により皮膜を破壊した後、定電位における電流の時間の時間変化を測定し皮膜の再生挙動を調査した。
1)アノード酸化した試料断面を透過型電子顕微鏡で観察した結果、試料表面に緻密なアノード酸化皮膜が形成しており、その厚さはほぼ純アルミニウムのそれと同様であった。熱水処理することで、皮膜の保護性が向上することが明らかになった。
2)塩化物イオンを含まないpH9.2のホウ酸溶液中において、定電位で電流の時間変化を測定した結果、皮膜破壊後電流は急激に増加し、0.3ms付近で最大値をとった後、指数関数的(傾き-1)に減少した。つまり、合金めっき層においても、従来の純アルミニウムの結果と同様に、皮膜の再生が逆対数則に従っているものと考えられた。
また、皮膜再生中に流れる電気量は、設定電位に比例して大きくなり、局部的に再生する皮膜の厚さが電位に比例して厚くなっていくことも明らかになった。
3)塩化物を含む溶液中において、電流は0.3ms付近で極大値をとった後、指数関数的には減少しなかった。高電位と高濃度においては、時間の経過とともに増加した。つまり、皮膜の補修が起こらず、局部的な金属の溶解が起こった。分極後、試料表面を共焦点走査型レーザー顕微鏡観察した結果、レーザー照射部に腐食生成物が観察された。
日本学術振興会, 奨励研究(A), 北海道大学, 12750631

Development of Novel Aluminium Surface finishing
Grants-in-Aid for Scientific Research
1999 - 2001
TAKAHASHI Hideaki, SAKAIRI Masatoshi, SHIMIZU Ken-ichi
This is an international exchange program between Belgium and Japan. Prof. J. Vereechen and Prof. H. Terryn, Vrije Universiteit, Brussels, participated in this program as counter parts from Belgium. The purpose of this project is to exchange mutual knowledge and information to develop a novel technology for the aluminum surface treatments. The exchanging records are in the following :
1) 1999, Nov. 13 - 29 Profs. Shimizu, Takahashi, and Dr. Sakairi visited Profs. Terryn and Vereecken at Frije Univ. at Brussels, and discussed on the anodizing of aluminum. During staying a mini- international symposium on "Aluminum Surface Science and Technology was held, and the delegation also visited several universities and companies in Belgium. The delegation visited Profs. Schultz and Lohrengel at Heinrich-Heine UNiv at Dusseldorf, Germany after Belgium, and also visited Prof. at Palelumo Univ., Italy.
2) 2000, March 4 - 24 Prof. Terryn visited Hokkaido Univ., and discussed on the formation mechanism of oxide films with Profs. Takahashi, Seo, Ohtsuka, and Narita, and Dr. Sakairi. He also gave a lecture on AC-graining of aluminum. He also visited Prof. Shibata at Osaka Univ., and Prof. Shimizu at Keio Univ. after Sapporo. Finally, he attended the 101st Meeting of Surface Finishing Society held in Chiba to give an invited lecture.
3) 2000, May 14 - 27 Dr. Sakairi, and Mr. Watanabe visited Prof. Terryn at Brusseles, and perfomed an experimental work by wave-resolving ellipsometry, and discussed about the film breakdown on aluminum with the colleague of Prof. Terryn. They attended 2nd Intern. Symp. on Aluminum Surface Science and Technology at Manchster.
4) 2000, Nov. 18 - 28 Prof. Vereecken visited Prof. Takahashi and Dr. Sakairi at Hokkaido Univ., Prof. Shibata at Osaka Univ., and Prof. Shimizu at Keio Univ.
5) 2001, August 7 - 15 Prof. Terryn visited Prof. Takahashi and Dr. Sakairi at Hokkaido Univ.
6) 2001, August 17 - September 1 Prof. Shimizu and Dr. Sakairi visited Prof. Terryn and Prof. Vereecken at Frije Univ., at Brussels.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), HOKKAIDO UNIVERSITY, 11694112

Development of Manufacturing Technology of Micro Mechano-Electronic Devices by Laser Irradiation / AFM Probe Processing / Electrochemistry
Grants-in-Aid for Scientific Research
1999 - 2001
TAKAHASHI Hideaki, SAKAIRI Masatoshi
1) Fabrication of Aluminum Mold for Plastic Injection Structuring
Aluminum mold was fabricated by hard anodizing, laser irradiation, and Ni-P electroless plating. Using the aluminum mold produced, plastic pegs with 20 cm length was obtained with a automatic mold system successfully. In the fabrication procedure, several hundred micrometer thick Ni-P layer was attempted to be deposited only at the laser-irradiated area. It was found that the local deposition of Ni-P is accomplished by forming relatively thick anodic oxide films and then by sealing pores of the oxide films.
2) Fabrication of micro pits and grooves by laser irradiation and electrochemical etching
Aluminum covered with anodic oxide films was irradiated with a pulsed YAG-laser in NaCl solutions on open circuit or during anodic polarization. The laser irradiation on open circuit allowed the production of cone shaped pores, while the laser irradiation during anodic polarization produced hemispherical pores. Micro grooves with 10 to 50 micrometer diameter was fabricated successfully by formation of barrier anodic oxide films, laser irradiation, formation of porous anodic oxide films at the laser irradiated area, and dissolution of anodic oxide films.
3) Fabrication of nano groves by AFM probe processing
Aluminum covered with thin anodic oxide films was scratched with AFM probes in solutions. The grooves with several hundred nanometer width were formed successfully on aluminum. The processing rate was found to depend strongly on the solution pH and chemical composition.
4) Fabrication of micro wires by laser irradiation of the aluminum rod
Aluminum rods with 2 - 5mm diameter was anodized to form porous anodic oxide films and then irradiated with a pulsed YAG laser in Ni^<2+> solutions. During laser irradiation, the aluminum rod was rotated and moved upward at a steady rate. After laser irradiation, the rod was cathodically polarized to deposit Ni at the laser irradiated area, and then immesed in a NaOH solution to dissolve the aluminum substrate. A nickel spiral wire with 50 micrometer width could be obtained successfully.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), HOKKAIDO UNIVERSITY, 11355029

アノード酸化を利用する多元系アルミニウム複合酸化物皮膜の形成
科学研究費助成事業
1999 - 1999
高橋 英明, 坂入 正敏
本研究プロジェクトは、ソルゲル法を用いて種々の酸化物をアルミニウム上にコーティングしたのち、これを中性電解質溶液中でアノード酸化することにより、各種の複合酸化物皮膜を形成するとともに、皮膜構造と皮膜の誘電的性質との関係を明らかにすることを目的としている。本年度は、BaTiO_3およびSiO_2皮膜について検討を加え、次の結果を得た。
1)BaTiO_3をコーティングしたアルミニウム試料を中性のホウ酸塩溶液中でアノード酸化を行うと、コーティング層と素地金属との界面にアルミナ層が成長する。このプロセスにより生成するアノード酸化皮膜の電気容量は、通常のアノード酸化により得られるバリヤー型アノード酸化皮膜のそれと同程度である。
SiO_2皮膜をあらかじめコーティングしておくと、アノード酸化のさい、コーティング層と素地金属との界面にアルミナ層が生成するとともに、Al-Si複合酸化物層が生成する。このプロセスにより生成するアノード酸化皮膜の電気容量は、通常のアノード酸化により得られるバリヤー型アノード酸化皮膜のそれに比べて20%大きい。また、この電気容量の増大は、複合酸化物層が極めて高い電場を指示できるためである。
日本学術振興会, 特定領域研究(A), 北海道大学, 11118205

パルス電流通電法による耐酸化性MoSi_2基超高温材料のその場合成
科学研究費助成事業
1998 - 1999
黒川 一哉, 坂入 正敏, 高橋 英明
ダイシリサイドは耐酸化性超高温材料の候補材の1種であるが、一般に融点が高いため溶融法での作製が困難であること、接合材料や複合材料の作製も容易にできることなどから、粉末冶金法による作製が有望である。本研究では、パルス電流通電による粒子間での放電現象の真偽について検討するとともに、作製したダイシリサイドの耐酸化性評価、さらに複合材料を想定した異種材料間での界面反応挙動ついて明かにするための実験を10-11年度にかけて行った。今年度は特に本方法で作製した各種ダイシリサイド焼結体の耐酸化性評価に関する研究を重点的に進めた。
1.FeSi_2、CoSi_2、CrSi_2、Vsi_2、TaSi_2、NbSi_2、Wsi_2およびMoSi_2の耐酸化性評価を500℃から1500℃の温度範囲において行い、各ダイシリサイドにおける金属とSiの同時酸化が起きる温度領域を明らかにした。
2.FeSi_2、CoSi_2、CrSi_2は1000℃以下の温度で優れた耐酸化性を有し、またMoSi_2は500℃±100℃を除く温度範囲で極めて優れた耐酸化性を示した。しかし、他のダイシリサイドでは500℃以上の温度範囲にわたって金属とSiの同時酸化が起こるため、優れた耐酸化性を示さなかった。
3.MoSi_2の500℃±100℃における同時酸化には、材料の欠陥(ポアやクラック)および雰囲気の水蒸気が強い影響を及ぼしていることを明らかにした。
4.パルス電流通電法により清浄で緻密なダイシリサイド焼結体およびその複合材料を作製することが可能であるが、特に耐酸化性超高温材料としてのポテンシャルが高いダイシリサイドはMoSi_2であることを明らかにした。
日本学術振興会, 萌芽的研究, 北海道大学, 10875138

レーザー剥離法を用いたAlアノード酸化皮膜の局部再生過程の研究
科学研究費助成事業
1998 - 1998
坂入 正敏
日本学術振興会, 奨励研究(A), 北海道大学, 10750521

ゾル・ゲルコーティング/アノード酸化によるAl-(TiNb)酸化物皮膜の形成
科学研究費助成事業
1998 - 1998
高橋 英明, 坂入 正敏
本研究は、アルミニウムアノード酸化皮膜に種々の酸化物を取り込ませ、誘電率の高い複合酸化物皮膜を形成しようとするものである。すなわち、アルミニウム試料上にゾルゲル法により種々の酸化物皮膜をコーティングしたのち、これを中性の電解質溶液中でアノード酸化することによりAl+Me複合酸化物皮膜を形成するとともに、その誘電的性質を調べた。表題には、AI-(Tl,Nb)複合酸化物皮膜とあるが、本年度においては、ゾル溶液の調製のしやすさなどの理由により、Al-Zr複合酸化物皮膜を選択した。得られた主な結果は、次の通りである。
1)電解研磨試料にゾルゲル法により、Zr-酸化物皮膜をコーティングするさい、加熱処理温度をT_h=573および873Kとした試料を、中性のホウ酸塩溶液中でアノード酸化すると、T_h=573Kの試料の場合には、Zr-酸化物層と素地金属との界面にAl-Zr複合酸化物外層およびAl_2O_3内層からなるアノード酸化皮膜が生成するが、T_h=873Kの場合には、Al_2O_3一層構造を有するアノード酸化皮膜が得られた。インピーダンス測定により、複合酸化物層を有する前者のアノード酸化皮膜がより大きい並列等価容量を持つことがわかった。
2)多孔質アノード皮膜化成試料上にZr-酸化物皮膜をコーティングすると、Zr-酸化物の一部はアノード酸化皮膜の細孔中に堆積し、一部はアノード酸化皮膜上に堆積することがわかった。これをアノード酸化すると、細孔中にAl-Zr複合酸化物が生成するとともに皮膜/素地金属界面にAl_2O_3層が生成することがわかった。
日本学術振興会, 特定領域研究(A), 北海道大学, 10131204

CLARIFICATION AND SUPPRESSION OF ACCELERATED OXIDATION IN MoSi_2 AS A ULTRA-HIGH TEMPERATURE MATERIAL.
Grants-in-Aid for Scientific Research
1997 - 1998
KUROKAWA Kazuya, SAKAIRI Masatoshi, TAKAHASHI Hideaki
MoSi_2 has been known for a promising material for ultra-high temperature applications. Although MoSi2 has outstanding oxidation resistance, it also shows accelerated oxidation behavior, resulting in pesting, especially at low temperatures. The accelerated oxidation and posting are based on simultaneous oxidation of Mo and Si. However, the mechanism of the simultaneous oxidation has not been clear. Aims of the present research are to clarify the mechanism and the method of the suppression. The main results are as follows.
(1) The accelerated oxidation is most severe at temperatures ranging from 673 to 773 K and became much milder as temperature increases.
(2) The accelerated oxidation and pesting are liable to occur under a combination of defects on surface of MoSi2 and H2O vapor in atmospheres.
(3) As the atomic ratio of Mo/Si increases, the oxidation resistance decreases. However, the effect is appreciably small.
(4) Defects such as pores and cracks are responsible for the accelerated oxidation and pesting. Conversely, the accelerated oxidation and pesting are completely suppressed by using fully dense MoSi2.
(5) The initiation sites of the simultaneous oxidation are deffects.
The accelerated oxidation and pesting, after all, are most strongly affected by preexisting defects located on the surface of MoSi2. Thermodynamical consideration also shows that the simultaneous oxidation is not an intrinsic property of MoSi2.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), HOKKAIDO UNIVERSITY, 09450263

Surface Patterning of Aluminum Using Pulsed-YAG Laser
Grants-in-Aid for Scientific Research
1996 - 1998
TAKAHASHI Hideaki, SAKAIRI Masatoshi, KUROKAWA Kazuya
Aluminum specimen covered with porous anodic oxide films was irradiated with a pulsed Nd-YAG laser in solutions containing metal ions, and then electro- or electroless- plating was carried out. Fine pattern was produced on an insulating organic board by the successive processes of anodizing, laser irradiation, metal deposition, insulator gluing, and metal substrate dissolution.
The main results obtained in this investigation are in the following.
1) Reaction during laser irradiation
It was found that laser irradiation causes the anodic oxide film to be removed effectively from the substrate at the laser-irradiated area, and that the film removal can be explained in terms of the laser ablation of the metal substrate. Spot size, D, and line width, W, of laser irradiated area was examined as the functions of laser power, distance between lens and specimen, and focal length of lens, and the D and W was found to be controlled in the range 15- 500 mm.
During laser irradiation in solutions containing Pd2+, Cu2+, and Ni2+ ions, fine particles of metals, Pd, Cu, and Ni, deposited on the surface at the laser-irradiated area, and this was verified by XPS and rest potential measurements. This is due to the redox reaction between metal ions and the aluminum substrate.
2) Metal deposition after laser irradiation
During cathodic polarization of the specimen in the solution containing Cu2+ or Ni2+ ions after laser irradiation lead to the deposition of a dense layer of Cu or Ni only at the film-removed area. The current efficiency for Cu or Ni deposition was about 100 %.
Localized electroless plating of Ni-P was also accomplished at the laser-irradiated area by changing the Pb2+ ion concentration in the electroless plating solution. At the initial stage of the Ni-P electroless plating, the fine particles depositing during laser irradiation were observed to act as nuclei of Ni-P deposition. The Pd particles enhanced Ni-P deposition very much, while Cu particles did not show any effect.
3) Fine patterning on organic insulating board
By computer control, fine patterns could be drawn, using Ni and Cu deposition after laser irradiation on aluminum. The patterned specimen was glued on a glass fiber-reinforced epoxy resin board, and the metal substrate was removed by dissolution in NaOH solution. The successive processes showed a possibility of the development of a new technology in the printed wiring board manufacturing industry.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), HOKKAIDO UNIVERSITY, 08455326

高性能電解コンデンサーのためのAl-(Ti,Nb,Ta)複合酸化物皮膜の形成
科学研究費助成事業
1997 - 1997
高橋 英明, 坂入 正敏, 黒川 一哉
本研究は、アルミニウム上に生成するアノード酸化皮膜中にTiO_2,Ta_2O_5,Nb_2O_5などを混入させ、これらとAl_2O_3との複合酸化物を形成することにより、誘電率の大きな酸化物皮膜を形成し、新しいタイプのアルミニウム電解コンデンサーの開発を目指しているが、本年度においては、CVD/アノード酸化を組み合わせた方法により、この複合酸化物皮膜の生成を試みた。得られた主な研究成果は、次のようである。
1.TiO_2をCVDにより、温度300°Cおよび400°Cに保ったアルミニウム上に形成すると、TiO_2皮膜の成長速度は温度が高いほど大きい。また、生成した皮膜は多孔質であり、無定型である。
2.TiO_2皮膜をコーティング後、400°Cで空気雰囲気中加熱処理を行うと、TiO_2は結晶化してアナターゼ型の結晶構造を示す。
3.TiO_2皮膜をコーティングした試料を、中性のホウ酸塩溶液中で定電流アノード酸化を行うと、TiO_2皮膜/素地金属界面に二層構造を示す酸化皮膜が生成する。外層は、Ti/Al-複合酸化物層であり、内層はAl_2O_3層からなる。
4.CVD/加熱処理/アノード酸化により得られた複合酸化物皮膜は、通常のアノード酸化により得られる皮膜に比べて約65%大きな電気容量を示す。
日本学術振興会, 重点領域研究, 北海道大学, 09237205

アルミニウム等の陽極酸化に関する研究　　　　　　　　　　　　　　　
Competitive research funding

金属材料の腐食・防食に関する研究　　　　　　　　　　　　　　　
Competitive research funding

レーザや微小液滴セルを用いる局部表面処理・電気化学　　　　　　　　　　　　　　　
Competitive research funding

Locallized corrosion of metals　　　　　　　　　　　　　　　
Competitive research funding

Local Surface Treatment on al by LASER　　　　　　　　　　　　　　　
Competitive research funding

Localized Corrosion on Metals by Photon Rupture Method　　　　　　　　　　　　　　　
Competitive research funding

Local Surface Treatment on Al by LASER　　　　　　　　　　　　　　　
Competitive research funding

Study on Anodic Oxidation behavior of Aluminum　　　　　　　　　　　　　　　
Competitive research funding

めっきによる三次元構造体の形成法　　　　　　　　　　　　　　　
Patent right
2002-256325

全道理科研究発表大会評価委員　　　　　　　　　　　　　　　
12 Oct. 2017 - 13 Oct. 2017
Advisor
Lecture
北海道高等学校文化連盟
全道理科研究発表大会