Enhancing the corrosion resistance of AISI 304 stainless steel by laser surface melting

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Proceedings titleSurface Engineering in Materials Science II
Conference2003 TMS Annual Meeting, March 2nd to 6th, San Diego California
Subjectcorrosion resistance; stainless steel; laser surface melting
AbstractAISI 304 stainless steel is widely used in industry for numerous applications requiring corrosion resistance. Despite its good corrosion resistance, the steel is prone to sensitization by heating, which significiantly reduces its resistance to localized corrosion, especially intergranular corrosion. In this study, a thin layer of sensitized AISI 304 stainless steel surface was melted using a CW C02 laser, to study the effect of laser surface melting on its corrosion resistance. Laser surface melting produced a thin protective surface layer with extremely fine microstructure, homogenous distribution of alloying elements and clean microstructure boundaries, which contributes to the desensitization of stainless steel and enhances its resistance to pitting and intergranular corrosion as well as general corrosion. The laser-melted layer also showed resistance to the sensitization and deterioration of the enhanced corrosion resistance when subjected to post heating.
Publication date
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NPARC number21272978
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Record identifier9e1627ea-6e75-444b-abca-b0039e89a47e
Record created2014-12-03
Record modified2016-05-09
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