The corrosion susceptibility of a laser powder bed fusion (LPBF) additively manufactured alloy, UNS S17400 (17-4 PH), was explored compared to conventional wrought material. Microstructural characteristics were characterized and related to corrosion behavior in quiescent, aqueous 0.6 M NaCl solutions. Electrochemical measurements demonstrated that the LPBF 17-4 PH alloy exhibited a reduced passivity range and active corrosion compared to its conventional wrought counterpart. A microelectrochemical cell was used to further understand the effects of the local scale and attributed the reduced corrosion resistance of the LPBF material to pores with diameters ≥50 μm.
Corrosion Properties of Powder Bed Fusion Additively Manufactured 17-4 PH Stainless Steel
Rebecca F. Schaller, Jason M. Taylor, Jeffrey Rodelas, Eric J. Schindelholz; Corrosion Properties of Powder Bed Fusion Additively Manufactured 17-4 PH Stainless Steel. CORROSION 1 July 2017; 73 (7): 796–807. doi: https://doi.org/10.5006/2365
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