Tribocorrosion of Passive Materials: A Review on Test Procedures and Standards

Figure 7

Evolution of the open circuit potential before, during, and after sliding wear test for a Ti6Al4V alloy with different DLC coatings in PBS solution. Sliding removes the passive layer on the surface, leading to a decrease in the potential value. At the end of sliding, the material is repassivated, and the potential increases to reach values close to those before sliding [69].