Corrosion resistance of chromized 316L stainless steel for PEMFC bipolar plates

K. H. Cho, W. G. Lee, S. B. Lee, H. Jang

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

Corrosion resistance of the chromized 316L stainless steel was studied in a proton exchange membrane fuel cell (PEMFC) operating condition. Cr-rich surface layer was formed by pack cementation technique and electrochemical properties of the chromized surface were examined by potentiodynamic and potentiostatic tests. Results showed that the Cr-rich layers underneath the free surface passivated the surface and protect the surface from corrosion in 0.5 M H2SO4 solution at 80 °C. However, the Cr-rich layers showed columnar grains with voids when the stainless steel was pack cemented for an extended period of time, resulting in drastic degradation of corrosion resistance. The optimum condition for the best corrosion resistance in the PEMFC operating condition was obtained without sacrificing the interfacial contact resistance.

Original languageEnglish
Pages (from-to)671-676
Number of pages6
JournalJournal of Power Sources
Volume178
Issue number2
DOIs
Publication statusPublished - 2008 Apr 1

Keywords

  • Bipolar plates
  • Chromizing
  • Corrosion
  • PEM fuel cell
  • Stainless steel

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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