Effects of surface quality on corrosion resistance of 316L stainless steel parts manufactured via SLM

The corrosion behavior of 316L stainless steel parts manufactured via selective laser melting ( SLM) was investigated in this study. In order to explain the relationship of corrosion resistance and surface quality, several examples were made by SLM with different processing parameters ( including laser power and scanning speed) and potentiodynamic polarization curve were measured. The results indicated that surface quality varied with different processing parameters and good surface quality contributed high corrosion resistance. In addition, when the laser power was 100W while scanning speed was 1050mm/s, the products possess high surface quality and corrosion resistance with corrosion potential -198 mV, corrosion current 0.556 mu A. (C) 2017 Laser Institute of America.