Pitting corrosion resistance of martensite of AISI 1045 steel and the beneficial role of interstitial carbon

Mariko Kadowaki, Izumi Muto, Yu Sugawara, Takashi Doi, Kaori Kawano, Nobuyoshi Hara

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The pitting corrosion resistance of AISI 1045 carbon steel with as-quenched, tempered, and low-carbon martensitic microstructures was investigated in boric-borate buffer solutions with and without NaCl. Analysis by micro-scale polarization found that tempering and decarburizing treatments decreased the pitting corrosion resistance of as-quenched martensite. The high corrosion resistance of the as-quenched martensite was likely due to the large amount of interstitial carbon. The pitting corrosion resistances of asquenched martensite, primary ferrite, and pearlite were compared using micro-scale polarization measurements. It was determined that the pitting corrosion resistances of the typical steel structures were ordered as follows: (high) as-quenched martensite > tempered martensite ∼ primary ferrite > pearlite (low). The pitting corrosion resistance of steel was shown to depend on its microstructure.

Original languageEnglish
Pages (from-to)C962-C972
JournalJournal of the Electrochemical Society
Volume164
Issue number14
DOIs
Publication statusPublished - 2017 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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