Dissolution behavior of α and γ phases and preferential dissolution mechanism of a duplex stainless steel in a simulated crevice solution

So Aoki, Hiroshi Yakuwa, Matsuho Miyasaka, Jun'ichi Sakai

    研究成果: Article査読

    6 被引用数 (Scopus)

    抄録

    The objectives of this study are to clarify the dissolution behavior of the ferritic phase (α phase) and the austenitic phase (γ phase) of a duplex stainless steel (DSS), and to propose a corrosion mechanism of the DSS through dissolution behavior of either the α phase or the γ phase at corrosion potential, respectively. Just a single phase specimen (α or γ phase specimen) was prepared by using selective dissolution of the DSS. The α phase showed less-noble corrosion potential compared to the γ phase, and passivated at less-noble potential. When the polarization curves of each phase are summed up, the obtained curve showed good agreement with the DSS polarization curve. The α phase of the DSS dissolved preferentially at corrosion potential. Based on these results, a preferential dissolution mechanism model of a DSS is proposed using internal polarization curves of each phase.

    本文言語English
    ページ(範囲)328-332
    ページ数5
    ジャーナルZairyo to Kankyo/ Corrosion Engineering
    60
    7
    DOI
    出版ステータスPublished - 2011

    ASJC Scopus subject areas

    • Electrochemistry
    • Materials Chemistry
    • Metals and Alloys
    • Surfaces, Coatings and Films

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