Premium
The effect of the change in the microscopic structures of the iron on corrosion resistance and passivated properties
Author(s) -
Jinlong Lv,
Luo Hongyun
Publication year - 2014
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.5604
Subject(s) - ultimate tensile strength , corrosion , materials science , oxygen , diffusion , tensile strain , metallurgy , boron , passivation , composite material , chemistry , layer (electronics) , physics , organic chemistry , thermodynamics
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 Fe 2 O 3 and thicker passive film on the surface. More Fe 2 O 3 and thicker passive film on the surface of tensile‐strained iron could improve corrosion resistance. Copyright © 2014 John Wiley & Sons, Ltd.