The effect of the change in the microscopic structures of the iron on corrosion resistance and passivated properties

Lv Jinlong, Hongyun Luo

Research output: Contribution to journalArticlepeer-review

Abstract

The passive film of iron showed n-type semiconductor characteristic in borate buffer solution, and its donor concentration increased slightly after tensile strain in the present study. However, comparing with solution-annealed sample, the anodic passive film formed on tensile-strained one was highly protective. The more dislocations on tensile-strained sample promoted the diffusion of iron and oxygen vacancy. Moreover, more donor density (mainly oxygen vacancies) promoted the diffusion of oxygen. They all facilitated tensile-strained sample to form Fe2O3 and thicker passive film on the surface. More Fe2O3 and thicker passive film on the surface of tensile-strained iron could improve corrosion resistance.

Original languageEnglish
Pages (from-to)613-619
Number of pages7
JournalSurface and Interface Analysis
Volume46
Issue number9
DOIs
Publication statusPublished - 2014 Sep

Keywords

  • EIS
  • Raman spectroscopy
  • iron
  • passive films
  • polarization

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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