Improvement of Corrosion Resistance and Structural Change in 304 Stainless Steel by means of Ion-Mixing

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  • Masumoto Yasuyuki
    Department of Material Science, Graduate School of Engineering, Hokkaido University
  • Takeda Mitsuhiro
    Department of Materials Science and Engineering, Miyagi National College of Technology
  • Suda Takanori
    Department of Material Science, Graduate School of Engineering, Hokkaido University
  • Watanabe Seiichi
    Department of Material Science, Graduate School of Engineering, Hokkaido University
  • Ohnuki Soumei
    Department of Material Science, Graduate School of Engineering, Hokkaido University
  • Ohtsuka Toshiaki
    Department of Material Science, Graduate School of Engineering, Hokkaido University
  • Ikezawa Kazuhiro
    Domestic Research Fellow, JSTCC, WERC

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High-energy ion-beam mixing technique was applied for the surface modification of austenitic stainless steel, followed by electrochemical characterization and microstructural observation. The co-mixing of silicon and chromium resisted the passivation current to 1/1000 relative to the un-modified condition. The corrosion resistance improved remarkably. Microstructural observation revealed that the enhanced diffusion and induced amorphous structure introduced by the co-mixing of silicon and chromium, which played a very important role in the improvement of electrochemical behavior at surface.

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