Inter-melt pool corrosion and repassivation of SS316L stainless steel processed by laser powder bed fusion
Source abstract
Abstract
Pit stability and repassivation of SS316L stainless steel processed by laser powder bed fusion (L-PBF) were examined through polarization experiments on one-dimensional (1D) pit electrodes. The L-PBF-SS316L pit was observed to grow along the Cr and Mo-depleted melt pool boundaries (MPBs) well below the nominal repassivation potential ( E rp) due to partial repassivation. MPBs promote pit stability in L-PBF-SS316L by offering an easy path for pit propagation. The implications on the reliability of the nominal E rp of L-PBF-SS316L as a metric for localized corrosion resistance are discussed.
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Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Additive Manufacturing Materials and Processes · Welding Techniques and Residual Stresses
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