炭素鋼のミクロ組織の局部電気化学特性と耐孔食性

Translated title of the contribution: Micro-electrochemical properties and pitting corrosion resistance of microstructures of carbon steels

Mariko Kadowaki, Izumi Muto, Yu Sugawara, Nobuyoshi Hara

Research output: Contribution to journalReview articlepeer-review

Abstract

This paper presents an introduction of the relationship between the electrochemical properties of microstructures and pitting corrosion resistance of carbon steels in chloride-containing near-neutral pH environments. Recent investigations by micro-scale electrochemical measurements have been demonstrated that the pitting corrosion resistance of typical microstructures was ordered as follows: (high) as-quenched martensite > primary ferrite > pearlite (low). In the case of pearlite, it has been reported that pits proceeded along the lamellar structure consisted of Fe3 C and ferrite. On the other hand, in the case of martensite, according to the studies based on the first-principles calculations, it has been proposed that the superior corrosion resistance was related with the electronic interaction between Fe and interstitial C. It was reported that the electronic density of states of Fe around the Fermi level decreased by the presence of interstitial C.

Translated title of the contributionMicro-electrochemical properties and pitting corrosion resistance of microstructures of carbon steels
Original languageJapanese
Pages (from-to)1085-1094
Number of pages10
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume107
Issue number12
DOIs
Publication statusPublished - 2021 Dec

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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