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US 4,398,966 AGranted
Corrosion of type 304 stainless steel by laser surface treatment
AssigneeHuntington Alloys, Inc.
InventorsThomas J. Kelly, Joseph L. Nelson
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Abstract
Surface treatment of stainless steel with pulsed beam from laser benefits resistance to corrosion in acid chloride media.
Claims10
A process for enhancing the corrosion resistance of stainless steel comprising directing a pulsed energy beam onto a localized portion of a metal surface of stainless steel to rapidly heat the metal to at least the solid solution temperature and then chilling the thus heated metal to result in a quench rate of at least 1.times.10.sup.3 .degree.C. per second whereby the thus treated localized portion of the surface exhibits enhanced resistance to corrosion.
Dependencies are inferred from the claim text.