Artificial MNS inclusions in stainless steel: Fabrication by spark plasma sintering and corrosion evaluation by microelectrochemical measurements

Research output: Contribution to journalArticle

Abstract

Spark plasma sintering was used to fabricate type 304L stainless steel specimens containing artificial manganese sulfide (MnS) inclusions, and a microelectrochemical technique was used to characterize the pit initiation behavior at the MnS. A 200 μm square electrode area that included an artificial MnS particle was potentio-dynamically polarized in 0.1 M NaCl, and the electrode surface was observed in situ by optical microscopy. The anodic dissolution of the MnS particle was observed in the passive region of the stainless steel. The pit occurred at the boundary between the particle and the steel matrix after the particle dissolved slightly. The dissolution potential and pit initiation behavior at the artificial MnS particles in the sintered stainless steel were confirmed to be similar to those at MnS inclusions in commercial stainless steels.

Original languageEnglish
Pages (from-to)196-198
Number of pages3
JournalIsij International
Volume60
Issue number1
DOIs
Publication statusPublished - 2020

Keywords

  • Microelectrochemical measurement
  • Pitting corrosion
  • Spark plasma sintering
  • Stainless steel
  • Sulfide inclusion

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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