Influence of the surface state on the corrosion behavior of the 316 L stainless steel manufactured by laser powder bed fusion
The effect of surface roughness on the corrosion behavior of 316 L stainless steel manufactured by LPBF has been evaluated. The behavior of the steel in the as-built state was compared to that ground up to 2500 grade. Three different aggressive environments were used: 3.5 wt% NaCl water solution, 3 wt% H2SO4 solution, and hightemperature oxidation at 800 ºC. The ground specimens showed higher corrosion resistance. The corrosion resistance was much smaller in the as-built samples for electrochemical tests, and the lowest mass gain after hightemperature oxidation was found in the ground specimens.
The authors wish to thank the Additive Manufacturing: from material to application project, ADITIMAT-CM (reference S2018/ NMT-4411) and Ministerio de Economía, Industria y Competitividad (PID2021–123891OB-I00, PID2021–124341OB-C21) for economical support of the present research.
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