The Effects of Prior-Deformation on Anodic Dissolution Kinetics and Pitting Behavior of 316L Stainless Steel

摘要

The effects of prior-deformation produced by cold roll on anodic dissolution and pitting behaviors of316L stainless steel (SS) in sulfuric acid solutions with chlorides are investigated by electrochemicalmesurements, materials microstructure anlysis and surface analysis techniques. Cold roll decreased the3 CSL grain boundaries proportion and increased the local misorientation in 316L SS. The effect ofcold roll was more significant in sulfuric acid solution with chlorides than in chloride-free solution.Chlorides and cold roll had a synergistic effect on accelerating anodic dissolution. The currentdensities under potentiostatic polarization, pits numbers and open pit diameters increased withincreasing applied potentials for both solution annealed 316L SS and cold rolled 316L SS. Cold rollincreased the number of pits and decreased the pit size at a certain applied potential.