Influence of dry sliding wear on the corrosion behavior of AISI 420

In this study, the effect of various normal loads on the dry sliding wear, microstructure evolution, and resulting corrosion behavior of martensitic AISI 420 were investigated. The results revealed adhesion‐dominated wear with material transfer and particles, leading to the formation of a lamellar microstructure containing delamination and pores around partly broken carbides. The microstructure evolution resulted in a significant decrease of the local corrosion resistance in 0.15 M NaCl solution, which was accompanied by a high concentration of corrosion sites within the worn areas. Dissolution inside the wear tracks was concentrated on the deformed microstructure. As the normal load increased, the effects of the wear intensified, further reducing the local corrosion resistance.