Role of MnS in the intergranular corrosion and depassivation of sensitized Type 304 stainless steel

Noriyuki Ida, Masashi Nishimoto, Izumi Muto, Yu Sugawara

研究成果: ジャーナルへの寄稿学術論文査読

3 被引用数 (Scopus)

抄録

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.

本文言語英語
論文番号2
ジャーナルnpj Materials Degradation
8
1
DOI
出版ステータス出版済み - 2024 12月

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