Microelectrochemistry on CrS and MnS inclusions and its relation with pitting potentials of stainless steels

Izumi Muto, Shimpei Kurokawa, Nobuyoshi Hara

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

The anodic dissolution behavior of CrS inclusions was compared with that of MnS inclusions containing around 10 at% Cr, (Mn,Cr)S, using a microelectrochemical cell in NaCl solutions. CrS inclusions were resistant to pit initiation compared with (Mn,Cr)S inclusions. The dissolution potential of CrS inclusions was found to be in the transpassive region of stainless steels. Stable pits were initiated in this potential region. (Mn,Cr)S inclusions dissolved in the passive region of stainless steels, providing lower pitting potentials than those of CrS-containing stainless steels. AES analysis of the surface films on CrS inclusions indicated that chromium-containing oxide films were formed on the CrS inclusions and grew with electrode potential, which suggested the oxide films on CrS inclusions prevented the anodic dissolution of the inclusions, thereby leading to an increased resistance to pit initiation.

本文言語English
ホスト出版物のタイトルECS Transactions - Critical Factors in Localized Corrosion 6, in Honor of Professor Shibata - 214th ECS Meeting
出版社Electrochemical Society Inc.
ページ269-280
ページ数12
52
ISBN(印刷版)9781615676453
DOI
出版ステータスPublished - 2009
イベントCritical Factors in Localized Corrosion 6, in Honor of Professor Shibata - 214th ECS Meeting - Honolulu, HI, United States
継続期間: 2008 10月 122008 10月 17

出版物シリーズ

名前ECS Transactions
番号52
16
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

Other

OtherCritical Factors in Localized Corrosion 6, in Honor of Professor Shibata - 214th ECS Meeting
国/地域United States
CityHonolulu, HI
Period08/10/1208/10/17

ASJC Scopus subject areas

  • 工学(全般)

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