Details of the Researcher

PHOTO

Masashi Nishimoto
Section
Graduate School of Engineering
Job title
Assistant Professor
Degree

  • 博士（工学）（東北大学）

  • 修士（工学）（東北大学）

e-Rad No.
20880967
Researcher ID
AAT-6588-2020

Research History 3

  • 2021/04 - Present
    Tohoku University　Graduate School of Engineering

  • 2020/04 - 2021/03
    Tohoku University　Graduate School of Engineering

  • 2017/04 - 2020/03
    日本学術振興会 特別研究員DC1

Education 3

  • Tohoku University　Graduate School of Engineering　Department of Materials Science

    2017/04 - 2020/03

  • Tohoku University　Graduate School of Engineering　Department of Materials Science

    2015/04 - 2017/03

  • Tohoku University　Faculty of Engineering　Department of Materials Science and Engineering

    2011/04 - 2015/03

Committee Memberships 3

  • (公社)腐食防食学会　編集委員会委員

    2024/04 - 2026/03

  • (一社)日本鉄鋼協会　東北支部 支部幹事

    2022/04 - 2024/03

  • (公社)日本金属学会 若手研究グループ「CO2ゼロエミッション社会に向けた耐環境構造金属材料研究グループ」　委員

    2022/03 - 2024/02

Professional Memberships 5

  • The Surface Finishing Society of Japan

  • Japan Society of Corrosion Engineering

  • The Japan Institute of Metals and Materials

  • The Iron and Steel Institute of Japan

  • The Electrochemical Society

Research Interests 10

  • マグネシウム合金

  • High-entropy alloys

  • Localized corrosion

  • Electrochemistry

  • Zn alloys

  • Al alloys

  • Stainless steels

  • Carbon steels

  • Corrosion resistance

  • Corrosion Science

Research Areas 2

  • Nanotechnology/Materials / Structural and functional materials /

  • Nanotechnology/Materials / Material fabrication and microstructure control /

Awards 3

  1. Materials Transactions Top Cited Authors 2024

    2025/03　Editorial committee of Materials Transactions　Review―Understanding and Controlling the Electrochemical Properties of Sulfide Inclusions for Improving the Pitting Corrosion Resistance of Stainless Steels

  2. The JSCE Award for the Promising Researcher

    2023/06　Japan Society of Corrosion Engineering

  3. 日本鉄鋼協会第170回秋季講演大会 学生ポスターセッション優秀賞

    2015/09　一般社団法人 日本鉄鋼協会　蛍光イメージングプレートによるステンレス鋼のすき間腐食発生過程の解析

Papers 40

  1. Formation of corrosion-resistant coatings on cast AZ91D magnesium alloy using pulse electrolysis and the importance of coating morphology International-journal Peer-reviewed

    Zheng Shao, Masashi Nishimoto, Izumi Muto

    Surface & Coatings Technology　513　132473　2025/10

    Publisher: Elsevier BV

    DOI： 10.1016/j.surfcoat.2025.132473 　

  2. In situ microscopy and electrochemical characteristics of initiation of intergranular corrosion of aging-treated Al–1Mg–0.65Si–0.8Cu alloy in 0.1 M NaCl International-journal Peer-reviewed

    Mutsuki Inagaki, Masashi Nishimoto, Mai Takaya, Izumi Muto

    Corrosion Science　252　112985　2025/08

    Publisher: Elsevier BV

    DOI： 10.1016/j.corsci.2025.112985 　

    ISSN： 0010-938X

  3. Microelectrochemical identification of the submicron-sized initiation site for pitting corrosion in 17–4PH stainless steel International-journal Peer-reviewed

    Kota Ujihara, Masashi Nishimoto, Izumi Muto

    Corrosion Science　251　112939　2025/07

    Publisher: Elsevier BV

    DOI： 10.1016/j.corsci.2025.112939 　

    ISSN： 0010-938X

  4. In situ ICP-MS analysis of passivation process and selective dissolution of Fe-15Cr alloy in sulfuric acid International-journal International-coauthorship Peer-reviewed

    Masashi Nishimoto, Jan Philipp Kollender, Izumi Muto, Achim Walter Hassel

    Corrosion Science　249　112846　2025/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.corsci.2025.112846 　

  5. Electrochemical aspects of the roles of Na2MoO4 conversion treatment: Galvanic corrosion inhibition of AA5083 coupled to AISI 1045 carbon steel International-journal Peer-reviewed

    Takumi Kosaba, Izumi Muto, Masashi Nishimoto, Yu Sugawara

    Corrosion Communications　Available online　2025/03

    Publisher: Elsevier BV

    DOI： 10.1016/j.corcom.2024.06.003 　

  6. Fabrication of Mo-encapsulated stainless steel by powder metallurgy and assessment of localized corrosion resistance International-journal Peer-reviewed

    Haruka Saito, Masashi Nishimoto, Izumi Muto

    Journal of Materials Research and Technology　33　6340-6349　2024/11

    Publisher: Elsevier BV

    DOI： 10.1016/j.jmrt.2024.11.027 　

    ISSN： 2238-7854

  7. Clarifying the Relationship Between Chemical States of P in Fe–P alloys and Pitting Corrosion Resistance International-journal Peer-reviewed

    Riku Takayama, Masashi Nishimoto, Haruka Sato, Izumi Muto

    Journal of The Electrochemical Society　171　(10)　101502　2024/10

    Publisher: The Electrochemical Society

    DOI： 10.1149/1945-7111/ad8269 　

    ISSN： 0013-4651

    eISSN： 1945-7111

    More details Close

    Fe–0.002P, Fe–0.05P, Fe–0.2P, and Fe–2P alloys (numbers indicate the mass%) were fabricated, and their pitting potentials, depassivation pH values, and active dissolution rates were measured. The order of pitting potentials was (high) Fe–0.002P ≥ Fe–0.05P ≥ Fe–0.2P >> Fe–2P (low), and that of depassivation pH values was (low) Fe–0.002P ≤ Fe–0.05P ≤ Fe–0.2P << Fe–2P (high). Both parameters changed significantly between the Fe–0.2P and Fe–2P alloys. No evidence of grain boundary segregation of P was observed in the Fe–0.05P alloy. In the Fe–0.2P alloy, grain boundary segregation of P was observed, but no pitting occurred at the grain boundaries. In the Fe–2P alloy, Fe3P precipitated at the grain boundaries and in grains, but pitting corrosion occurred in the alloy matrix and not in Fe3P. This indicated that P in the solid solution was the main cause of the decrease in pitting corrosion resistance. The P concentration in the surface oxide film on Fe–2P was higher than that on Fe–0.2P, and the P in the films was determined to be FePO4. The decrease in the pitting resistance with an increasing P concentration was due to FePO4.

  8. Effect of precipitated Mg-containing corrosion products on the anodic behavior of steel in aqueous corrosion for Zn-Al-Mg coated steel International-journal Peer-reviewed

    Shimpei Tokuda, Yoshikatsu Nishida, Masashi Nishimoto, Izumi Muto, Takehiro Takahashi

    Corrosion Science　239　112372　2024/10

    Publisher: Elsevier BV

    DOI： 10.1016/j.corsci.2024.112372 　

    ISSN： 0010-938X

  9. Elucidation of the trigger for trenching around Al6(Fe, Mn) on AA5083 aluminum alloy in diluted synthetic seawater International-journal Peer-reviewed

    Takumi Kosaba, Masashi Nishimoto, Izumi Muto

    Corrosion Science　239　112362　2024/10

    Publisher: Elsevier BV

    DOI： 10.1016/j.corsci.2024.112362 　

    ISSN： 0010-938X

  10. Pitting corrosion characteristics of sintered Type 316 L stainless steel: relationship between pores and MnS International-journal Peer-reviewed

    Haruka Saito, Masashi Nishimoto, Izumi Muto

    npj Materials Degradation　8　61　2024/06

    Publisher: Springer Nature

    DOI： 10.1038/s41529-024-00482-6 　

  11. Electrochemical properties of MnSe inclusions and improving the pitting corrosion resistance of stainless steel via Se microalloying International-journal Peer-reviewed

    Masashi Nishimoto, Tomoki Katsuyama, Izumi Muto

    Scientific Reports　14　7156　2024/03

    Publisher: Springer Nature

    DOI： 10.1038/s41598-024-57995-y 　

  12. Role of MnS in the intergranular corrosion and depassivation of sensitized Type 304 stainless steel International-journal Peer-reviewed

    Noriyuki Ida, Masashi Nishimoto, Izumi Muto, Yu Sugawara

    npj Materials Degradation　8　2　2024/01

    Publisher: Springer Nature

    DOI： 10.1038/s41529-023-00419-5 　

    eISSN： 2397-2106

    More details Close

    During polarization in 1 M NaCl (pH 5.4), intergranular corrosion of sensitized re-sulfurized Type 304 stainless steel occurred after pit initiation at MnS inclusions. Intergranular corrosion occurred when the pitting corrosion reached a Cr-depleted region along the sensitized grain boundaries. During depassivation under open-circuit conditions in 1 M NaCl (pH 1.0), MnS dissolution occurred as the first step, and the second step was the initiation of intergranular corrosion. Finally, dissolution of the steel matrix occurred. The role of MnS in the initiation of intergranular corrosion and depassivation of sensitized steel is discussed.

  13. Comparison of the Pitting Corrosion Resistance of Bainite and Martensite in Fe-0.4C-1.5Si-2Mn Steel International-journal Peer-reviewed

    Masashi Nishimoto, Izumi Muto, Yu Sugawara

    ISIJ International　64　(2)　497-501　2024/01

    Publisher: The Iron and Steel Institute of Japan

    DOI： 10.2355/isijinternational.ISIJINT-2023-135 　

    ISSN： 0915-1559

    eISSN： 1347-5460

  14. Initial dissolution of Mg-containing phase and corrosion product formation in cut-edge corrosion of Zn-11%Al-3%Mg-0.2%Si coated steel International-journal Peer-reviewed

    Shimpei Tokuda, Yoshikatsu Nishida, Masashi Nishimoto, Izumi Muto, Hiromasa Shoji

    Corrosion Science　225　111605　2023/12

    Publisher: Elsevier BV

    DOI： 10.1016/j.corsci.2023.111605 　

    ISSN： 0010-938X

  15. Difference in the Precursory Process of the Intergranular Corrosion of Aged Al-Cu and Al-Cu-Mg Alloys in 0.1 M NaCl International-journal Peer-reviewed

    Hiroki Yoshida, Masashi Nishimoto, Izumi Muto, Mai Takaya, Yoshihiko Kyo, Tadashi Minoda, Yu Sugawara

    Journal of The Electrochemical Society　170　(11)　111501　2023/11

    Publisher: The Electrochemical Society

    DOI： 10.1149/1945-7111/ad0666 　

    ISSN： 0013-4651

    eISSN： 1945-7111

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    Real-time in situ optical microscopy observations of the initiation behavior of intergranular corrosion on artificially aged Al-4.5Cu and Al-4.5Cu-1.5Mg were performed in naturally aerated 0.1 M NaCl at pH 6.0. For both alloys, the discoloration of intermetallic particles occurred before intergranular corrosion, and a discolored coarse intermetallic particle on the grain boundary acted as the initiation site for intergranular corrosion (Al2Cu for Al-4.5Cu and Al2CuMg for Al-4.5Cu-1.4Mg). The discoloration of Al2Cu particles was localized and occurred only on a small number of particles. However, almost all Al2CuMg particles were discolored; the overall surface of the particles was discolored uniformly. The discoloration of Al2Cu on Al-4.5Cu led to micropitting. In contrast, the discoloration of Al2CuMg on Al-4.5Cu-1.5Mg caused the trenching of particles. The difference in the initiation behavior of intergranular corrosion was discussed in terms of these precursory phenomena.

  16. Electrochemical Surface Modification of Al8Co19Cr23Fe32Ni18 in H2SO4: A High-Entropy Alloy with High Pitting Corrosion Resistance and High Oxidation Resistance International-journal Peer-reviewed

    Li Pao, Masashi Nishimoto, Izumi Muto, Yu Sugawara

    Materials Transactions　64　(9)　2286-2295　2023/09

    Publisher: Japan Institute of Metals and Materials

    DOI： 10.2320/matertrans.mt-m2023088 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  17. Review―Understanding and Controlling the Electrochemical Properties of Sulfide Inclusions for Improving the Pitting Corrosion Resistance of Stainless Steels International-journal Peer-reviewed

    Masashi Nishimoto, Izumi Muto, Yu Sugawara

    Materials Transactions　64　(9)　2051-2058　2023/09

    Publisher: Japan Society of Corrosion Engineering

    DOI： 10.2320/matertrans.MT-C2023003 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  18. Enhancing pitting corrosion resistance of AA7075 through cathodic deposition of Mn-accumulated film on intermetallic particles containing copper International-journal Peer-reviewed

    Ko Ebina, Masashi Nishimoto, Izumi Muto, Yu Sugawara

    Corrosion Science　220　111299　2023/08

    Publisher: Elsevier BV

    DOI： 10.1016/j.corsci.2023.111299 　

  19. Effect of quenching in aqueous polyvinylpyrrolidone solutions on the microstructure and pitting corrosion resistance of AISI 1045 carbon steel International-journal Peer-reviewed

    Masashi Nishimoto, Izumi Muto, Takashi Doi, Kaori Kawano, Yu Sugawara

    Materials and Corrosion　74　(5)　724-733　2023/05

    Publisher: Wiley-VCH

    DOI： 10.1002/maco.202213658 　

    ISSN： 0947-5117

    eISSN： 1521-4176

  20. Role of KMnO4–NaF Treatment in Galvanic Corrosion Resistance of AA5083 Coupled to Steel International-journal Peer-reviewed

    Takumi Kosaba, Izumi Muto, Masashi Nishimoto, Yu Sugawara

    Materials Transactions　64　(4)　896-903　2023/04

    Publisher: The Japan Institute of Light Metals

    DOI： 10.2320/matertrans.mt-l2022021 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  21. Role of Cu in corrosion resistance of CoCrCuFeNi medium-entropy alloys: Importance of compositional change and thickening of oxide films International-journal Peer-reviewed

    Masaru Kato, Masashi Nishimoto, Izumi Muto, Yu Sugawara

    Corrosion Science　213　110982　2023/04

    Publisher: Elsevier BV

    DOI： 10.1016/j.corsci.2023.110982 　

    ISSN： 0010-938X

  22. Micro-electrochemical insights into pit initiation site on aged UNS S32750 super duplex stainless steel International-journal Peer-reviewed

    Shuichiro Amatsuka, Masashi Nishimoto, Izumi Muto, Makoto Kawamori, Yuya Takara, Yu Sugawara

    npj Materials Degradation　7　15　2023/03

    Publisher: Springer Nature

    DOI： 10.1038/s41529-023-00335-8 　

    eISSN： 2397-2106

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    An aging treatment of UNS S32750 super duplex stainless steel at 1173 K for 1.0 ks produced σ and secondary austenite (γ2) phases in the α and γ phase boundary regions. Small amount of Mn-Cr oxide and MnS complex inclusions were present in the steel. No pitting was observed during the potentiodynamic polarization of a small area (200 × 200 µm) without inclusions in 1 M MgCl2 at 348 K. Because the electrode area included α, γ, σ, and γ2 phases, these phases and their boundaries alone could not act as initiation sites for pitting. The electrode area size was gradually reduced from 3 × 3 mm to 1 × 1 mm, and pitting corrosion was observed to occur at the Mn-Cr oxide and MnS complex inclusions in a region that appeared to be the γ2 phase near the σ phase.

  23. Chemical Conversion Treatment of AA5083 Aluminum Alloy and AISI 1045 Carbon Steel under Galvanically Coupled Condition in Na2MoO4: Effect of pH on Corrosion Resistance International-journal Peer-reviewed

    Takumi Kosaba, Izumi Muto, Masashi Nishimoto, Yu Sugawara

    Materials Transactions　64　(2)　568-577　2023/02

    Publisher: The Japan Institute of Metals and Materials

    DOI： 10.2320/matertrans.mt-m2022163 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  24. Fabrication of a model specimen for understanding micro-galvanic corrosion at the boundary of α-Mg and β-Mg17Al12 International-journal Peer-reviewed

    Zheng Shao, Masashi Nishimoto, Izumi Muto, Yu Sugawara

    Journal of Magnesium and Alloys　11　(1)　137-153　2023/01

    Publisher: Elsevier BV

    DOI： 10.1016/j.jma.2022.10.020 　

  25. Corrosion-resistant sintered stainless steels with non-equilibrium Mo-rich phases International-journal Peer-reviewed

    Haruka Saito, Izumi Muto, Masashi Nishimoto, Yu Sugawara

    Materials Today Communications　33　104211　2022/12

    Publisher: Elsevier BV

    DOI： 10.1016/j.mtcomm.2022.104211 　

    ISSN： 2352-4928

  26. Micro-Electrochemical Aspects of the Effects of Temperature on Pit Initiation at MnS Inclusion in Type 304 Stainless Steel International-journal Peer-reviewed

    Riku Takayama, Masashi Nishimoto, Izumi Muto, Yu Sugawara

    Journal of The Electrochemical Society　169　(11)　111501　2022/11

    Publisher: The Electrochemical Society

    DOI： 10.1149/1945-7111/ac9d6c 　

    ISSN： 0013-4651

    eISSN： 1945-7111

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    In 1 M NaCl, the pitting potentials of resulfurized Type 304 stainless steel decreased as the temperature increased from 25 to 75 °C. The dissolution potential of MnS in 0.1 M Na2SO4 also decreased with increase in temperature. As the macroscale pitting potentials at all temperatures ranged within the dissolution potential range of MnS, the decrease in MnS dissolution potential was critical in determining the decrease in pitting potentials at high temperatures. However, in 1 M NaCl, the microscale pitting potentials exceeded those of the macroscale pitting: pits were generated at the boundaries of the MnS and steel matrix at 25 and 50 °C, but at 75 °C, pitting occurred in a deeper portion of the MnS inclusion. The formation of an occluded geometry is essential for pitting; however, because the dissolution rate and potential of MnS vary with temperature, the shape and location of the occluded geometry at inclusions as well are expected to vary with temperature. The depassivation pH of Type 304 stainless steel in 1 M NaCl–10 mM Na2S2O3 increased from 2 to approximately 3 at temperatures from 25 °C to 75 °C. The dissolved MnS species appeared to significantly influence the decrease in pitting potential.

  27. Sudden pH and Cl− Concentration Changes during the Crevice Corrosion of Type 430 Stainless Steel International-journal Peer-reviewed

    Kengo Matsumura, Masashi Nishimoto, Izumi Muto, Yu Sugawara

    Journal of The Electrochemical Society　169　(10)　101506　2022/10

    Publisher: The Electrochemical Society

    DOI： 10.1149/1945-7111/ac9bda 　

    ISSN： 0013-4651

    eISSN： 1945-7111

    More details Close

    To determine whether large sudden pH and Cl− concentration changes occur during the crevice corrosion of Fe-16Cr, as in the case of Fe-18Cr-10Ni-5.4Mn, simultaneous measurement of the pH and Cl− concentration was performed in 0.01 M NaCl (pH 3.0). The corrosivity of the crevice solution was different before and after crevice corrosion initiation, and the sudden changes in the pH and Cl− concentration inside the crevice were the same as those for Fe-18Cr-10Ni-5.4Mn. The incubation period was characterized by weak acidification (pH 1.6−2.0) and a small accumulation of Cl− (0.1−0.3 M). The growth period was characterized by strong acidification (pH ≤ 1.0) and a large accumulation of Cl− (≥1.0 M). At the crevice corrosion initiation site, a metastable pit was observed and a S signal was detected from the residual in the pit. It can be concluded that the crevice corrosion of Type 430 stainless steels is initiated by Cl−, which generates metastable pitting at sulfide inclusions. The effect of the electrode potential on the pH and Cl− concentration was investigated in 0.01 M NaCl from −0.05 to 0.1 V. No effect of potential was observed during both the crevice corrosion incubation and growth periods.

  28. Role of CaS Inclusions in Pitting Initiation of Carbon Steel: Triggering Steel Depassivation International-journal Peer-reviewed

    Masashi Nishimoto, Izumi Muto, Yu Sugawara

    ISIJ International　62　(4)　750-757　2022/04

    Publisher: The Iron and Steel Institute of Japan

    DOI： 10.2355/isijinternational.ISIJINT-2021-567 　

    ISSN： 0915-1559

    eISSN： 1347-5460

  29. Real-time in situ observation of the corrosion process of die-cast AZ91D magnesium alloy in NaCl solutions under galvanostatic polarization International-journal Peer-reviewed

    Zheng Shao, Masashi Nishimoto, Izumi Muto, Yu Sugawara

    Corrosion Science　192　109834　2021/11

    Publisher: Elsevier BV

    DOI： 10.1016/j.corsci.2021.109834 　

    ISSN： 0010-938X

  30. Roles of Alloying Elements in the Corrosion Resistance of Equiatomic CoCrFeMnNi High-Entropy Alloy and Application to Corrosion-Resistant Alloy Design International-journal Peer-reviewed

    Takumi Aiso, Masashi Nishimoto, Izumi Muto, Yu Sugawara

    Materials Transactions　62　(11)　1677-1680　2021/11

    Publisher: The Japan Institute of Metals and Materials

    DOI： 10.2320/matertrans.mt-m2021136 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  31. Visualizing the Crevice Corrosion Behavior of Nitrogen-Containing Stainless Steel: Changes in pH and Cl− Distributions with Initiation, Growth, and Local Repassivation Peer-reviewed

    Zairyo-to-Kankyo　70　(8)　250-256　2021/08

    Publisher: Japan Society of Corrosion Engineering

    DOI： 10.3323/jcorr.70.250 　

  32. Cerium addition to CaS inclusions in stainless steel: Insolubilizing water-soluble inclusions and improving pitting corrosion resistance International-journal Peer-reviewed

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    Corrosion Science　180　109222　2021/03

    Publisher: Elsevier BV

    DOI： 10.1016/j.corsci.2020.109222 　

    ISSN： 0010-938X

  33. Passivity of (Mn,Cr)S inclusions in type 304 stainless steel: The role of Cr and the critical concentration for preventing inclusion dissolution in NaCl solution International-journal Peer-reviewed

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    Corrosion Science　176　109060　2020/11

    Publisher: Elsevier

    DOI： 10.1016/j.corsci.2020.109060 　

    ISSN： 0010-938X

  34. High-Temperature Annealing of Ferritic Stainless Steel: Modification of Sulfide Inclusion Properties and Inhibition of Inclusion Dissolution Peer-reviewed

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    Zairyo-to-Kankyo　69　(7)　194-198　2020/07/10

    Publisher: Japan Society of Corrosion Engineering

    DOI： 10.3323/jcorr.69.194 　

    ISSN： 0917-0480

    eISSN： 1881-9664

  35. Artificial MnS Inclusions in Stainless Steel: Fabrication by Spark Plasma Sintering and Corrosion Evaluation by Microelectrochemical Measurements International-journal Peer-reviewed

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    ISIJ International　60　(1)　196-198　2020/01

    Publisher: Iron and Steel Institute of Japan

    DOI： 10.2355/isijinternational.isijint-2019-408 　

    ISSN： 0915-1559

  36. Morphological Characteristics of Trenching around MnS Inclusions in Type 316 Stainless Steel: The Role of Molybdenum in Pitting Corrosion Resistance International-journal Peer-reviewed

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    Journal of The Electrochemical Society　166　(11)　C3081-C3089　2019/04

    Publisher: The Electrochemical Society

    DOI： 10.1149/2.0131911jes 　

  37. Solubility of sulfur in the solid oxides of CaO-Al2O3 system International-journal

    Xu Gao, Yosuke Baba, Masashi Nishimoto, Shigeru Ueda, Shin-ya Kitamura

    ICS 2018 - 7th International Congress on Science and Technology of Steelmaking: The Challenge of Industry 4.0　2018/06

    Publisher: Associazione Italiana di Metallurgia

  38. Micro-Electrochemical Properties of CeS Inclusions in Stainless Steel and Inhibiting Effects of Ce3+ Ions on Pitting International-journal Peer-reviewed

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    Journal of The Electrochemical Society　164　(13)　C901-C910　2017/11

    Publisher: The Electrochemical Society

    DOI： 10.1149/2.0051714jes 　

    ISSN： 0013-4651

  39. Microscopic Polarization Behavior of Cerium Sulfide Inclusions in Stainless Steel International-journal Peer-reviewed

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    ECS Transactions　75　(52)　27-34　2017/01/10

    Publisher: The Electrochemical Society

    DOI： 10.1149/07552.0027ecst 　

    ISSN： 1938-6737

  40. Simultaneous visualization of pH and Cl− distributions inside the crevice of stainless steel International-journal Peer-reviewed

    Masashi Nishimoto, Junichiro Ogawa, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    Corrosion Science　106　298-302　2016/05

    Publisher: Elsevier

    DOI： 10.1016/j.corsci.2016.01.028 　

    ISSN： 0010-938X

Show all ︎Show first 5

Misc. 2

  1. ハイエントロピー合金の材料科学と原子力材料としての可能性1 ハイエントロピー合金の電気化学特性の解析と高耐食合金開発への応用 Invited

    西本 昌史, 武藤 泉

    日本原子力学会誌ATOMOΣ　66　(7)　351-355　2024/07

    Publisher: 一般社団法人 日本原子力学会

    DOI： 10.3327/jaesjb.66.7_351 　

    ISSN： 1882-2606

    eISSN： 2433-7285

  2. ステンレス鋼の耐孔食性向上に向けた硫化物系介在物の電気化学特性の解明と制御 Invited Peer-reviewed

    西本 昌史, 武藤 泉, 菅原 優

    材料と環境　71　(12)　401-408　2022/12

    Publisher: 公益社団法人 腐食防食学会

    DOI： 10.3323/jcorr.71.401 　

Presentations 37

  1. [進歩賞記念講演] 硫化物系介在物の組成制御によるステンレス鋼の耐孔食性向上指針の導出 Invited

    西本 昌史

    腐食防食学会 材料と環境2023　2023/06/06

  2. ハイエントロピー合金の電気化学特性の解析と高耐食合金開発への応用 Invited

    西本 昌史, 武藤 泉, 菅原 優

    日本原子力学会 2023年春の年会　2023/03/15

  3. 放電プラズマ焼結とマイクロ電気化学計測を利用するステンレス鋼の硫化物系介在物の耐孔食性解析 Invited

    西本 昌史, 武藤 泉

    日本鉄鋼協会 材料の組織と特性部会「ステンレス鋼のミクロ組織と耐食性」自主フォーラム シンポジウム　2023/03/09

  4. ステンレス鋼の硫化物系介在物の組成制御による耐孔食性向上 Invited

    西本 昌史

    日本鉄鋼協会東北支部 地区講演会および若手研究者フォーラム　2022/12/07

  5. Corrosion Resistance of 55%Al-Zn Alloy Fabricated By Ball Milling and Spark Plasma Sintering International-presentation

    Masashi Nishimoto, Tetsuro Kobayashi, Izumi Muto, Shimpei Tokuda, Yoshikatsu Nishida, Yu Sugawara

    242nd ECS Meeting　2022/10/10

  6. (Invited) Effect of Cr Concentration on Dissolution of (Mn,Cr)S Inclusions in Stainless Steel International-presentation Invited

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    PRiME 2020 (238th Meeting of The Electrochemical Society)　2020/10/05

  7. Effect of Sn on Dissolution Behavior of Al Prepared By Spark Plasma Sintering International-presentation

    Masashi Nishimoto, Fuki Shinagawa, Izumi Muto

    PRiME 2024 (246th ECS Meeting)　2024/10/08

  8. 放電プラズマ焼結により作製したAlの溶解挙動に及ぼすSnの影響

    西本 昌史, 品川 風樹, 武藤 泉

    日本金属学会 2024年秋期(第175回)講演大会　2024/09/19

  9. ステンレス鋼のMnSe系介在物の電気化学特性の解析

    西本 昌史, 勝山 智己, 武藤 泉

    腐食防食学会 材料と環境2024　2024/06/03

  10. Effect of Selenium on Dissolution of Manganese Sulfide Inclusions in Stainless Steel International-presentation

    Masashi Nishimoto, Tomoki Katsuyama, Izumi Muto, Yu Sugawara

    244th ECS Meeting　2023/10/09

  11. ステンレス鋼の硫化物系介在物の組成と耐孔食性の関係の解析

    西本 昌史, 武藤 泉, 菅原 優

    日本鉄鋼協会 第186回秋季講演大会　2023/09/21

  12. 炭素鋼の金属組織と耐孔食性に及ぼすポリビニルピロリドン溶液を用いた焼入れの影響

    西本 昌史, 武藤 泉, 土井 教史, 河野 佳織, 菅原 優

    日本金属学会 2023年春期(第172回)講演大会　2023/03/09

  13. CaS介在物を起点とする炭素鋼の孔食発生挙動の解析

    西本 昌史, 武藤 泉, 菅原 優

    腐食防食学会 材料と環境2022　2022/05/25

  14. ステンレス鋼の耐孔食性に及ぼす硫化物系介在物へのCe添加の影響

    腐食防食学会 第68回材料と環境討論会　2021/10/26

  15. Beneficial Effects of Cerium Addition to Sulfide Inclusions on Pitting Corrosion Resistance of Stainless Steels International-presentation

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    240th Meeting of The Electrochemical Society　2021/10/11

  16. 18Crステンレス鋼のMnS介在物の溶解に及ぼす熱処理温度の影響

    西本 昌史, 武藤 泉, 菅原 優, 原 信義

    日本金属学会 2021年秋期講演大会　2021/09/16

  17. 18Crフェライト系ステンレス鋼の硫化物系介在物の溶解挙動に及ぼす熱処理温度の影響

    西本 昌史, 武藤 泉, 菅原 優, 原 信義

    腐食防食学会 材料と環境2021　2021/05/20

  18. (Mn,Cr)S介在物の不働態化によるステンレス鋼の耐孔食性向上

    西本 昌史, 武藤 泉, 菅原 優, 原 信義

    日本金属学会 2021年春期講演大会　2021/03/19

  19. 数理モデル化のための炭素鋼の孔食発生のマイクロ電気化学解析

    西本 昌史, 武藤 泉, 菅原 優

    日本鉄鋼協会 建設用鋼材利用検討WG「腐食劣化解析に基づく鋼構造物維持の最適化」研究会「インフラ構造物の経年劣化に対する維持管理の最適化」シンポジウム　2021/03/18

  20. ステンレス鋼の(Mn,Cr)S介在物の溶解電位と介在物中Cr濃度の関係

    西本 昌史, 武藤 泉, 菅原 優, 原 信義

    腐食防食学会 第67回材料と環境討論会　2020/10/27

  21. 数理モデル化のための局部腐食環境における炭素鋼のマイクロ電気化学特性の解明

    西本 昌史, 武藤 泉, 菅原 優

    日本鉄鋼協会 第180回秋季講演大会　2020/09/17

  22. ステンレス鋼の(Mn,Cr)S介在物の溶解挙動に及ぼす介在物中Cr濃度の影響

    西本昌史, 武藤泉, 菅原優, 原信義

    日本金属学会 2020年春期講演大会　2020/03/19

  23. Effect of Molybdenum on Pit Initiation Process at MnS Inclusions in Stainless Steel International-presentation

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    EUROCORR 2019　2019/09/10

  24. ステンレス鋼/介在物界面の電気化学溶解特性に及ぼす母相および介在物組成の影響

    西本昌史, 武藤泉, 菅原優, 原信義

    日本金属学会 2019年春期講演大会　2019/03/21

  25. ステンレス鋼のMnS介在物/鋼境界部の溶解挙動に及ぼすMoの影響

    西本昌史, 武藤泉, 菅原優, 原信義

    腐食防食学会 第65回材料と環境討論会　2018/10/30

  26. Effect of Molybdenum on Pit Initiation at Manganese Sulfide Inclusions in Stainless Steel International-presentation

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    AiMES 2018 (234th Meeting of The Electrochemical Society)　2018/10/01

  27. Effects of valve metals on passive films of Fe-15Cr stainless steels International-presentation International-coauthorship

    Masashi Nishimoto, Jan Philipp Kollender, Izumi Muto, Achim Walter Hassel

    EnFI 2018 – 11th International Workshop on Engineering of Functional Interfaces　2018/07/02

  28. MnS介在物を起点とするステンレス鋼の孔食発生に及ぼすMoの影響

    西本昌史, 武藤泉, 菅原優, 原信義

    日本鉄鋼協会 第175回春季講演大会　2018/03/20

  29. Role of Cerium Ions for Improving Pitting Corrosion Resistance of Sulfide Inclusions in Stainless Steels International-presentation

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    232nd Meeting of The Electrochemical Society　2017/10/05

  30. ステンレス鋼の硫化物系介在物の電気化学特性に及ぼすCeおよびMoの影響解析

    西本昌史, 武藤泉, 菅原優, 原信義

    日本鉄鋼協会 第174回秋季講演大会　2017/09/07

  31. Effect of Cerium on Pitting Corrosion Resistance of Sulfide Inclusions in Stainless Steels International-presentation

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    2017 Joint Symposium on MSE for the 21st Century　2017/06/26

  32. 硫化物系介在物を起点とするステンレス鋼の孔食発生挙動に及ぼすCeの影響解析

    西本昌史, 武藤泉, 菅原優, 原信義

    材料と環境2017　2017/05/24

  33. Microscopic Polarization Behavior of Cerium Sulfide Inclusions in Stainless Steel International-presentation

    Masashi Nishimoto, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

    PRiME 2016 (230th Meeting of The Electrochemical Society)　2016/10/04

  34. ステンレス鋼の CeS 系介在物のマイクロ電気化学特性

    西本昌史, 武藤泉, 菅原優, 原信義

    日本鉄鋼協会 第172回秋季講演大会　2016/09/23

  35. 塩化物イオン濃度とpHの同時計測が可能な蛍光イメージングプレートの開発とステンレス鋼のすき間腐食発生過程の解析

    西本 昌史, 小川 純一郎, 武藤 泉, 菅原 優, 原 信義

    腐食防食学会 材料と環境2016　2016/05/27

  36. ステンレス鋼のCeS系介在物起点の耐孔食性解析

    西本昌史, 武藤泉, 菅原優, 原信義

    日本金属学会2016年春期講演大会　2016/03/23

  37. 蛍光イメージングプレートによるステンレス鋼のすき間腐食発生過程の解析

    西本昌史, 武藤泉, 菅原優, 原信義

    日本鉄鋼協会 第170回秋季講演大会　2015/09/17

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Industrial Property Rights 8

  1. 高耐食銅合金

    藤原 夏美, 西本 昌史, 武藤 泉, 菅原 優

    特許7706784

    Property Type: Patent

  2. 腐食環境用銅合金

    藤原 夏美, 西本 昌史, 武藤 泉, 菅原 優

    特許7706783

    Property Type: Patent

  3. 耐食鋼

    西本 昌史, 武藤 泉, 菅原 優

    特許7678561

    Property Type: Patent

  4. 耐食性評価用金属試験片の作製方法

    西本 昌史, 武藤 泉, 菅原 優, 原 信義

    特許6804777

    Property Type: Patent

  5. Ａｌ－Ｚｎ系合金被覆鋼板

    徳田 慎平, 西田 義勝, 莊司 浩雅, 西本 昌史, 小林 哲郎, 武藤 泉, 菅原 優

    Property Type: Patent

  6. 耐孔食性に優れるＦｅ基合金およびその製造方法

    齋藤 遥, 武藤 泉, 西本 昌史, 菅原 優

    Property Type: Patent

  7. Ｃｅ含有耐食鋼

    西本 昌史, 武藤 泉, 菅原 優, 原 信義

    Property Type: Patent

  8. アルミニウム空気電池用負極材

    西本 昌史, 武藤 泉

    Property Type: Patent

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Research Projects 12

  1. 生体内均一吸収性を有する整形・口腔外科等医療用新規インプラントMg系合金の開発 Competitive

    西本 昌史, 武藤 泉

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 東北大学

    2025/04 - 2029/03

  2. 非平衡組織と多相化の探求による耐食性に優れる電気接点用Cu合金の創製 Competitive

    武藤 泉, 西本 昌史

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(A)

    Institution: 東北大学

    2025/04 - 2028/03

  3. 硫化物系介在物の電気化学特性制御による省資源型高耐食ステンレス鋼の開発 Competitive

    西本 昌史

    Offer Organization: 日本鉄鋼協会

    System: 第34回鉄鋼研究振興助成

    Institution: 東北大学

    2025/04 - 2027/03

  4. Mg合金の局部腐食挙動の解析と表面処理による高耐食化 Competitive

    西本 昌史

    Offer Organization: 公益財団法人軽金属奨学会

    System: 研究補助金

    Institution: 東北大学

    2025/07 - 2026/06

  5. 新たな医療用インプラントとしてのMg基ナノコンポジット生体吸収性材料の開発 Competitive

    西本 昌史

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究

    Institution: 東北大学

    2023/04 - 2026/03

  6. ナノ複相組織が創発する電気接点用Cu合金の新規高耐食化原理の探求 Competitive

    武藤 泉, 西本 昌史, 菅原 優

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 挑戦的研究(萌芽)

    Institution: 東北大学

    2023/06 - 2025/03

  7. 光触媒を第二相とする省資源型高耐食ステンレス鋼の創製とナノレベル電気化学反応解析 Competitive

    武藤 泉, 西本 昌史, 菅原 優

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(A)

    Institution: 東北大学

    2022/04 - 2025/03

  8. 電気接点用Sn合金の耐食性向上に関する研究 Competitive

    西本 昌史

    Offer Organization: 公益財団法人 昭特科学振興財団

    System: 2023年度（第6回）一般研究助成

    Institution: 東北大学

    2023/10 - 2024/05

  9. 腐食起点無害化による耐食鋼の開発：粉末冶金と微小電極を用いた電気化学解析 Competitive

    西本 昌史

    Offer Organization: 日本鉄鋼協会

    System: 第31回鉄鋼研究振興助成

    Institution: 東北大学

    2022/04 - 2024/03

  10. Creation of Smart Alloys with Anticorrosion Functions: A Change in Concept from Solid Solution of Corrosion-Resistant Elements to Secondary Phases Competitive

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Exploratory)

    Institution: Tohoku University

    2021/07 - 2023/03

  11. Zn-Al系合金めっきの省資源・長寿命化 -二相組織の防食機能分担と性能向上- Competitive

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Early-Career Scientists

    Institution: Tohoku University

    2021/04 - 2023/03

  12. 介在物の溶解生成物を不働態化剤として利用するステンレス鋼の新規高耐食化技術の創出 Competitive

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for JSPS Fellows

    Institution: Tohoku University

    2017/04 - 2020/03

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Teaching Experience 3

  1. 創造工学研修　東北大学 工学部 Undergraduate (specialized)

  2. 数学物理学演習I　東北大学 工学部 材料科学総合学科 Undergraduate (specialized)

  3. 材料科学総合学実験　東北大学 工学部 材料科学総合学科 Undergraduate (specialized)

Media Coverage 8

  1. 東北大、ステンレス鋼表面に発生する微小な腐食の出発点を見つける技術を開発

    株式会社日本経済新聞社　日経電子版　プレスリリース

    2025/04/25

    Type: Internet

  2. 東北大学、耐食性4倍の積層造形用ステンレス鋼材を開発

    株式会社日経BP　日経クロステック

    2022/09/30

    Type: Internet

    More details Close

    東北大学大学院の齋藤遥氏らの研究グループは、耐食性が従来品の約4倍と高い3次元（3D）積層造形用ステンレス鋼材を開発した。高耐食化元素であるモリブデン（Mo）を固溶させるのではなく、独立した第2相として濃化・分散させることで耐食性を高めた。併せて、ステンレス鋼の高耐食化につながる機構を解明した。

  3. ステンレス、塩水に4倍強く 3Dプリンター向けに新手法

    株式会社日本経済新聞社　日経電子版

    2022/08/31

    Type: Internet

  4. 3D積層造形用ステンレス鋼材に応用可能な新しい高耐食化機構を発見――Mo濃化組織を分散 東北大学

    株式会社メイテック　fabcross for エンジニア

    2022/08/31

    Type: Internet

    More details Close

    東北大学は2022年8月30日、同大学大学院工学研究科知能デバイス材料学専攻の研究チームが、3D積層造形用ステンレス鋼材に応用可能な新しい高耐食化機構を発見したと発表した。 海水など塩化物濃度が高い水溶液中において…

  5. 東北大，3D積層造形用ステンレス鋼材を高耐食化

    株式会社オプトロニクス社　OPTRONICS ONLINE

    2022/08/31

    Type: Internet

    More details Close

    東北大学の研究グループは，高耐食化元素として知られるMoを固溶させるのではなく，独立した第二相として濃化・分散させた新規の焼結ステンレス鋼を開発した（ニュースリリース）。ステンレス（SUS）鋼は，高耐食材料として，さま […]

  6. 東北大／ステンレス鋼のすき間腐食／２要素を同時計測／省資源型高耐食鋼目指す

    株式会社産業新聞社　日刊産業新聞

    2016/03/02

    Type: Newspaper, magazine

  7. 東北大，ステンレスの腐食を蛍光イメージングで可視化

    株式会社オプトロニクス社　OPTRONICS ONLINE

    2016/02/25

    Type: Internet

    More details Close

    東北大学の研究チームは，水溶液中における金属表面の水素イオン濃度指数（pH）と塩化物イオン濃度の分布を同時計測できる蛍光イメ ージングプレートを開発し，ステンレス鋼のすき間腐食発生過程における水素イオンと塩化物イオンの局 […]

  8. 臨界値で突然発生——ステンレス鋼の腐食を可視化

    株式会社日経BP　日経クロステック

    2016/02/25

    Type: Internet

    More details Close

    東北大学は2016年2月24日、水溶液中における金属表面の水素イオン濃度指数（pH）と塩化物イオン濃度の分布を同時計測できる蛍光イメージングプレートを開発し、ステンレス鋼のすき間腐食が発生する過程を可視化することに成功したと発表した。腐食はゆっくり進行するのではなく、すき間内溶液組成が臨界値に達すると突然発生することが観察された。

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Academic Activities 4

  1. 日本金属学会2025年秋期(第177回)講演大会 公募シンポジウム S3 ハイエントロピー合金の材料科学(Ⅻ) テーマ責任者 シンポジウムco-chair

    札幌

    2025/09/17 - 2025/09/19

    Activity type: Competition, symposium, etc.

  2. 日本金属学会2024年秋期(第175回)講演大会 公募シンポジウム S2 ハイエントロピー合金の材料科学(Ⅺ) テーマ責任者 シンポジウムco-chair

    大阪

    2024/09/18 - 2024/09/20

    Activity type: Competition, symposium, etc.

  3. 日本金属学会2023年秋期(第173回)講演大会 公募シンポジウム S3 ハイエントロピー合金の材料科学(X) テーマ責任者 シンポジウムco-chair

    富山

    2023/09/20 - 2023/09/22

    Activity type: Competition, symposium, etc.

  4. 表面技術協会 第148回講演大会 実行委員

    米沢

    2023/09/04 - 2023/09/05

    Activity type: Competition, symposium, etc.