Effect of Cr content on pit initiation behavior at MnS inclusions in Fe-Cr steels

Shinpei Asano, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

A microelectrochemical technique was applied to make clear the effect of Cr on the pit initiation behavior at MnS inclusions in Fe- Cr steels. MnS inclusions in Fe-5Cr, 12Cr, and 18Cr steels dissolved around 0 V (vs. Ag/AgCl, 3.33 M KCl), and their dissolution potential regions were independent of Cr contents in the steels. A stable pit was initiated at the inclusions around 0 V on Fe-5Cr and 12Cr in 0.1 M NaCl. In the case of Fe-5Cr, after the stable pit initiation, the surface dissolution was started from the pit. In contrast, no surface dissolution was observed on Fe-12Cr, even though the stable pit was generated. In micro-scale polarization, no stable pit was initiated at MnS inclusions on Fe-18Cr. Only metastable pitting was observed around 0 V. The repassivation ability of Fe-Cr alloys has an important role in the pitting events at MnS inclusions.

本文言語English
ホスト出版物のタイトルECS Transactions
編集者H. Habazaki, K. Azumi, A. W. Hassel, K. Hebert
出版社Electrochemical Society Inc.
ページ9-20
ページ数12
27
ISBN(電子版)9781607687764
DOI
出版ステータスPublished - 2016
イベントOxide Films: A Symposium in Honor of Masahiro Seo - PRiME 2016/230th ECS Meeting - Honolulu, United States
継続期間: 2016 10 22016 10 7

出版物シリーズ

名前ECS Transactions
番号27
75
ISSN(印刷版)1938-6737
ISSN(電子版)1938-5862

Other

OtherOxide Films: A Symposium in Honor of Masahiro Seo - PRiME 2016/230th ECS Meeting
国/地域United States
CityHonolulu
Period16/10/216/10/7

ASJC Scopus subject areas

  • 工学(全般)

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