In situ monitoring of crevice corrosion morphology of Type 316L stainless steel and repassivation behavior induced by sulfate ions

Takahito Aoyama, Yu Sugawara, Izumi Muto, Nobuyoshi Hara

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

To analyze the repassivation mechanism induced by SO42− ions, in situ monitoring of the crevice corrosion morphology on Type 316L stainless steel was performed. The repassivation of the crevice corrosion was observed when the solution was changed from 1 M NaCl to 0.88 M Na2SO4 or to 1 M NaCl-0.88 M Na2SO4. The active dissolution of Type 316L stainless steel was suppressed by SO42− ions at pH 0.4 in anodic polarization measurements. The transition from active to passive states inside the crevice was likely promoted by SO42− ions.

Original languageEnglish
Pages (from-to)131-140
Number of pages10
JournalCorrosion Science
Volume127
DOIs
Publication statusPublished - 2017 Oct

Keywords

  • Crevice corrosion
  • Potentiostatic
  • Repassivation
  • Stainless steel

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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