Microscopic polarization behavior and thermodynamic stability of TiS and Ti4Ci2Si2 inclusions in stainless steels

Naoya Shimahashi, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

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

Abstract

Microelectrochemical polarization, thermodynamic calculations, and Auger electron spectroscopy were performed to elucidate the predominant factor affecting the pit initiation resistance at sulfide and carbosulfide inclusions in stainless steels. The Ti-oxide enriched layers on the inclusions inhibit the dissolution of the TiS and Ti4Ci2Si2 inclusions in the passive and trans-passive regions of stainless steels. While the MnS inclusion surfaces are covered by Mn-oxides, the corrosion resistance of Mn-oxides is not sufficient to prevent the inclusion dissolution and pit initiation. The oxide enriched surface layers on the sulfide and the carbosulfide inclusions greatly influence the pit initiation resistance at the inclusions.

Original languageEnglish
Title of host publicationECS Transactions
PublisherElectrochemical Society Inc.
Pages3-14
Number of pages12
Edition47
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2013

Publication series

NameECS Transactions
Number47
Volume50
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

ASJC Scopus subject areas

  • Engineering(all)

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