Improving pitting corrosion resistance at inclusions and ductility of a martensitic medium-carbon steel: Effectiveness of short-time tempering

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

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The optimal tempering conditions for a martensitic medium-carbon steel (0.47 mass% C) were investigated in terms of balancing ductility and pitting corrosion resistance. By tempering the as-quenched martensite, its Vickers hardness drastically decreased within 0.1 h, suggesting that ductility was sufficiently recovered by short-time tempering. Based on the results of micro-scale polarization in boric-borate buffer solutions with NaCl (pH 8.0), stable pits were initiated at non-metallic inclusions in the specimens tempered for at least 1 h; however, no stable pit was generated on the 0.1 h tempered and as-quenched specimens. Short-time tempering of martensite was suggested to be a feasible approach to striking an optimal balance between facilitating pitting corrosion resistance and achieving the desired mechanical properties of martensitic carbon steels.

Original languageEnglish
Pages (from-to)C711-C721
JournalJournal of the Electrochemical Society
Volume165
Issue number11
DOIs
Publication statusPublished - 2018

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Improving pitting corrosion resistance at inclusions and ductility of a martensitic medium-carbon steel: Effectiveness of short-time tempering'. Together they form a unique fingerprint.

Cite this