Microelectrochemical investigation of pit initiation site on austenitic cast stainless steel

Asako Otake, Izumi Muto, Aya Chiba, Yu Sugawara, Nobuyoshi Hara

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

A microelectrochemical technique was applied to ascertain the pit initiation behavior at the δ/γ-grain boundary of Type 304L austenitic cast stainless steel in 1 M NaCl solution. The size of electrode area was changed from ca. 0.01 mm2 (100 μm×100 μm) to ca. 100 mm2 (10 mm×10 mm). The density for pit initiation site of Type 304L cast stainless steel was estimated to be around 1 site/mm2. From anodic polarization, transmission electron microscopy, and energy-dispersive X-ray fluorescence analysis, P-and S-segregation was confirmed to be associated with the pit initiation at δ/γ-grain boundary. In addition to this, Si-segregation or Si-containing inclusion at the boundaries was thought to be a factor affecting the pit initiation at the δ/γ-grain boundary.

本文言語English
ホスト出版物のタイトルCritical Factors in Localized Corrosion 8
編集者E. Tada, S. Fujimoto, J. Kish, G. Frankel
出版社Electrochemical Society Inc.
ページ1-11
ページ数11
28
ISBN(電子版)9781607685395
DOI
出版ステータスPublished - 2015 1 1
イベントSymposium on Critical Factors in Localized Corrosion 8 - 228th ECS Meeting - Phoenix, United States
継続期間: 2015 10 112015 10 15

出版物シリーズ

名前ECS Transactions
番号28
69
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

Other

OtherSymposium on Critical Factors in Localized Corrosion 8 - 228th ECS Meeting
国/地域United States
CityPhoenix
Period15/10/1115/10/15

ASJC Scopus subject areas

  • 工学(全般)

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