Inhibition of localized corrosion of Ni-Ti superelastic alloy in NaCl solution by hydrogen charging

Ken'Ichi Yokoyama*, Yuki Hirata, Toshiaki Inaba, Kenichiro Mutoh, Jun'Ichi Sakai

*この研究の対応する著者

    研究成果: Article査読

    13 被引用数 (Scopus)

    抄録

    Inhibition of the localized corrosion of Ni-Ti superelastic alloy in 0.9% NaCl solution has been attempted by charging with a small amount of hydrogen, which causes negligible hydrogen embrittlement. Upon a small amount of hydrogen charging, no pitting potential is observed in anodic polarization curves. From scanning electron microscope observations, localized corrosion is inhibited on the entire side surface of charged specimens. With increasing amount of charged hydrogen, the corrosion potential shifts in the less noble direction and the current density increases under anodic applied potential. When the hydrogen charged specimens are aged in the atmosphere at room temperature, the corrosion potential becomes almost the same as that of the non-charged specimen, but the inhibition of localized corrosion remains. The present study indicates that a small amount of hydrogen charging is effective for inhibiting the localized corrosion of the alloy in NaCl solution.

    本文言語English
    ページ(範囲)365-372
    ページ数8
    ジャーナルJournal of Alloys and Compounds
    639
    DOI
    出版ステータスPublished - 2015 8 5

    ASJC Scopus subject areas

    • 機械工学
    • 材料力学
    • 材料化学
    • 金属および合金

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