Iushi zhongguo effect of nano/ultrafine grain on passive film properties of metastable austenitic stainless steels with and without loading

Lv Jinlong, Luo Hongyun

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The passive behaviors of coarse and nano/ultrafine grain austenitic stainless steels processed by cold rolling and reversion annealing were investigated. The average grain about 200 nm was obtained by cold rolling down to 94% reduction in thickness and reversion annealing at 800 °C for 250 s. Passive films formed in borate buffer solution (pH 9.2) have been characterized by electrochemical impedance spectroscopy and Mott-Schottky plots. The impedance results indicated a distinct inflection was observed with the increasing of potential, however, the Mott-Schottky analysis did not show such inflection point in the same potential range. There were not evident differences in passive properties between coarse and nano/ultrafine grain samples. This was attributed to synergistic effect of grain refinement and orientation. However, the corrosion resistance of the passive film in nano/ultrafine grain sample was higher than that in coarse grain sample after immersion test by the three-point-bend loading.

Original languageEnglish
Pages (from-to)674-680
Number of pages7
JournalMaterials Chemistry and Physics
Volume139
Issue number2-3
DOIs
Publication statusPublished - 2013 May 15

Keywords

  • Annealing
  • Corrosion
  • Deformation
  • Electrochemical techniques
  • Phase transitions

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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