Tribocorrosion Behavior of γ′-Fe4N Nitride Layer Formed on Mild Steel by Plasma Nitriding in Chloride-Containing Solution

Nitriding has long been used to engineer the surfaces of engineering steels improve their surface and subsurface properties. The role compound layer (γ′-Fe4N and/or ε-Fe2-3N) in improving tribological corrosion-resistant properties nitrided established. However, there have very few studies on response tribocorrosion corrosive environments. In this work, behavior a 5 μm thick γ′-Fe4N nitride produced mild steel (MS) by plasma nitriding studied NaCl-containing solution under various electrochemical conditions. results show that at cathodic potential −700 mV (saturated calomel electrode, SCE), where mechanical wear is predominant, total material removal (TMR) from 37% smaller than untreated MS, open circuit potential, TMR 34% while an anodic −200 (SCE), can reduce 87%. beneficial effect derived its high hardness good corrosion resistance test ability resist both wear–corrosion synergism.