Effect of multipass thermomechanical processing on the corrosion behaviour of biomedical Co–Cr–Mo alloys

Kenta Yamanaka, Manami Mori, Ika Kartika, Moch Syaiful Anwar, Koji Kuramoto, Shigeo Sato, Akihiko Chiba

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We prepare a high-strength Co–28Cr–6Mo–0.14N–0.04C (mass%) alloy by multipass hot rolling and clarify the influence of the associated microstructural evolution on the corrosion behaviour. Potentiodynamic polarisation, static immersion tests, and electrochemical impedance spectroscopy indicate that the corrosion behaviour and passive film characteristics do not vary significantly between the annealed and hot-rolled samples. However, hot rolling was found to weaken the active-to-passive transition during anodic polarisation. These results suggest that significant grain refinement and accumulation of dislocations, which occurred simultaneously during multipass hot rolling, enhance the passivity.

Original languageEnglish
Pages (from-to)178-187
Number of pages10
JournalCorrosion Science
Volume148
DOIs
Publication statusPublished - 2019 Mar

Keywords

  • A. Alloy
  • A. Cobalt
  • B. EIS
  • B. Polarisation
  • B. XPS
  • C. Effects of strain

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Effect of multipass thermomechanical processing on the corrosion behaviour of biomedical Co–Cr–Mo alloys'. Together they form a unique fingerprint.

  • Cite this