A modified pin-on-ring device was used to study corrosive wear of a duplex stainless steel (DSS) containing ferrite (α) and austenite (γ) phases in 1 mol/L sulfuric acid (H2SO4) at room temperature. Different percentages of γ phase in the matrix (γp) were obtained by annealing at different solution temperatures. The corrosive wear resistance of the DSS containing small amounts of γ phase was shown to be greater than that of DSS containing large amounts of γ phase under low loads (< 22 N), but the opposite was true under high loads (> 22 N). The same relationships between corrosive wear rate and load were found under cathodic protection at −600 mVSCE. The morphologies of wear tracks and debris were observed by scanning electron microscopy (SEM). The influence of the amount of γ phase in the matrix on hardness, corrosion, and corrosive wear resistance was evaluated.
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Lu et al. (1995) studied this question.
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