Dissolution Behavior of Duplex Stainless Steels in Crevice Corrosion Growth Step

So Aoki, Yushi Nada, Jun'Ichi Sakai

    研究成果: Article査読

    1 被引用数 (Scopus)

    抄録

    The objective of this study is to clarify dissolution behavior of duplex stainless steels in crevice corrosion growth step. Crevice corrosion grew on the duplex stainless steels by holding potential at various values. After a certain period, dissolution behavior of the crevice corrosion was analyzed based on observation of corroded area. Change in crevice corrosion dissolution behavior with time was also investigated by means of in-situ observation. Four types of dissolution regions could be observed in the corrosion area from outside toward inside direction, i.e., tip of the corroded area toward initiation point, in a crevice; they were passive region, the preferential dissolution region of γ phase, α phase and γ phase dissolution region, and the preferential dissolution region of α phase. The crevice corrosion which maintained that four dissolution regions grew toward the edge of the crevice. This dissolution behavior was given at all the potential where crevice corrosion occurred.

    本文言語English
    ページ(範囲)366-372
    ページ数7
    ジャーナルZairyo to Kankyo/ Corrosion Engineering
    64
    8
    出版ステータスPublished - 2015

    ASJC Scopus subject areas

    • 電気化学
    • 材料化学
    • 金属および合金
    • 表面、皮膜および薄膜

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