Corrosion Behavior of Aqua-Blasted and Laser-Engraved Type 316L Stainless Steel

Benjamin Krawczyk, P. Cook, J. Hobbs, Dirk Engelberg

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    Abstract

    The effect of aqua blasting and laser engraving on surface microstructure development, residual stress and corrosion resistance of type 316L stainless steel has been investigated. Aqua blasting resulted in a deformed near-surface microstructure containing compressive residual stresses. Subsequent laser engraving produced a surface layer with tensile residual stresses reaching to a depth of 200 microns. Changes of surface roughness topography were accompanied by the development of a thick oxide/hydroxide film after laser engraving. The atmospheric corrosion behavior of all surfaces with MgCl2-laden droplets was compared to their electrochemical response in 1M NaCl and 0.7 M HCl aqueous solutions. The measured total volume loss after atmospheric corrosion testing was similar for all investigated surface conditions. Laser-engraved surface exhibited the smallest number of corrosion sites, but the largest mean corrosion depth.
    Original languageEnglish
    Pages (from-to)6167-6181
    Number of pages15
    JournalJournal of Materials Engineering and Performance
    Volume26
    Issue number12
    Early online date10 Nov 2017
    DOIs
    Publication statusPublished - 10 Nov 2017

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