The effects of grain refinement and deformation on corrosion resistance of passive film formed on the surface of 304 stainless steels

Lv Jinlong, Luo Hongyun, Liang Tongxiang, Guo Wenli

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Abstract The nano/ultrafine grained stainless steel promoted the form of more deformation nanotwins and inhibited dislocation slip and strain induced α′-martensite transformation during deformation compared with coarse grained stainless steel. The diffusivity of the point defects in passive film in coarse grain stainless steel was lower than that in nano/ultrafine one. The corrosion resistance of nano/ultrafine grained stainless steel was improved by reducing content of strain induced α′-martensite. Moreover, the donor and acceptor densities in passive film formed on the stainless steel increased due to more strain induced α′-martensites and more chloride ions. Fewer strain induced α′-martensites and more nanotwins in nano/ultrafine grained stainless steel improved its corrosion resistance.

Original languageEnglish
Article number8287
Pages (from-to)896-907
Number of pages12
JournalMaterials Research Bulletin
Volume70
DOIs
Publication statusPublished - 2015 Jul 3

Keywords

  • Electrochemical properties
  • Microstructure
  • Nanostructures
  • Phase transitions
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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