Microelectrochemical investigation of pit initiation site on austenitic cast stainless steel

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationCritical Factors in Localized Corrosion 8
EditorsE. Tada, S. Fujimoto, J. Kish, G. Frankel
PublisherElectrochemical Society Inc.
Pages1-11
Number of pages11
Edition28
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2015 Jan 1
EventSymposium on Critical Factors in Localized Corrosion 8 - 228th ECS Meeting - Phoenix, United States
Duration: 2015 Oct 112015 Oct 15

Publication series

NameECS Transactions
Number28
Volume69
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

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

ASJC Scopus subject areas

  • Engineering(all)

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