Influence of surface mechanical attrition treatment (SMAT) on the corrosion behaviour of AISI 304 stainless steel

Influence of surface mechanical attrition treatment (SMAT) on the corrosion behaviour of AISI 304 stainless steel

•SMAT of 304 SS induced mechanical twins, martensite phase and dislocations.•SMAT increased the surface roughness and corrosion rate of 304 SS in 0.6M NaCl.•Current–time curves indicate formation of defective passive film on SMATed 304 SS.•Increase in roughness, martensite, dislocations nullify bene...

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Bibliographic Details
Published in:Corrosion science Vol. 74; pp. 332 - 344
Main Authors: Balusamy, T., Sankara Narayanan, T.S.N., Ravichandran, K., Park, Il Song, Lee, Min Ho
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 01-09-2013
Elsevier
Subjects:
A. Stainless steel
Applied sciences
Attrition
Austenitic stainless steels
B. EIS
B. Polarization
B. Potentiostatic
C. Passive films
C. Pitting corrosion
Corrosion
Corrosion environments
Exact sciences and technology
Metals. Metallurgy
Nanocrystals
Residual stress
Stainless steels
Strain
Surface roughness
B. Potentiostatic
C. Passive films
C. Pitting corrosion
B. EIS
A. Stainless steel
B. Polarization
Austenitic stainless steel
Surface layer
Passivity
Surface treatment
Pitting corrosion
Mechanical treatment
Stainless steel-304
Stainless steel
Impedance
Passivation
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Summary:•SMAT of 304 SS induced mechanical twins, martensite phase and dislocations.•SMAT increased the surface roughness and corrosion rate of 304 SS in 0.6M NaCl.•Current–time curves indicate formation of defective passive film on SMATed 304 SS.•Increase in roughness, martensite, dislocations nullify beneficial effect of SMAT. The influence of surface mechanical attrition treatment (SMAT) on the corrosion behaviour of AISI 304 stainless steel in 0.6M NaCl was studied. SMAT of 304 SS induced plastic deformation, enabled formation of mechanical twins and strain induced ά-martensite phase, increased the surface roughness and imparted compressive residual stress. SMAT caused a deleterious influence on the corrosion resistance of 304 SS in 0.6M NaCl. Double log plots of current–time transients at 25mV(SCE) indicate formation of defective passive film on SMATed 304 SS. Increase in surface roughness, strain induced martensite and dislocations nullify the beneficial influence of surface nanocrystallization.
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ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2013.04.056