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

doi:10.1016/j.materresbull.2015.06.030

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

ENG - Fracture and Reliability Research Institute

Research output: Contribution to journal › Article

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 language	English
Article number	8287
Pages (from-to)	896-907
Number of pages	12
Journal	Materials Research Bulletin
Volume	70
DOIs	https://doi.org/10.1016/j.materresbull.2015.06.030
Publication status	Published - 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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Jinlong, L., Hongyun, L., Tongxiang, L., & Wenli, G. (2015). The effects of grain refinement and deformation on corrosion resistance of passive film formed on the surface of 304 stainless steels. Materials Research Bulletin, 70, 896-907. [8287]. https://doi.org/10.1016/j.materresbull.2015.06.030

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Y1 - 2015/7/3

N2 - 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.

AB - 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.

KW - Electrochemical properties

KW - Microstructure

KW - Nanostructures

KW - Phase transitions

KW - X-ray diffraction

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