Study of corrosion behaviour of Ti-coated AISI 316L stainless steel in a simulated body fluid solution

摘要

In the field of implantology, biomaterials must satisfy appropriate physico-chemical and mechanical characteristics on the one hand and be biocompatible on the other hand. In this work, we have studied an AISI 316L stainless steel/titanium system. The stainless steel substrate, onto which titanium film was deposited by a PVD (physical vapour deposition) process, was cold-rolled at different rates (20%, 40%, 60% and 80%). Linear sweep voltammetry was used, in complement to micro structural and mechanical characterisations, to study the deposit and the substrate. The electrochemical results indicate that the best electrochemical behaviour in a simulated physiological environment is obtained for the titanium deposit on a substrate cold-rolled at a rate of between 20% and 60%. Even though the deposit generates internal stress at the film/substrate interface, titanium deposits present good fretting features and wear resistance.