Effect of Proteins and Normal Load on the Tribocorrosion Behavior of Hip Joint Implant Material (CoCrMo Alloy)

摘要

CoCrMo alloys are extensively used for hip replacements due to their wear and corrosion resistance [1]. A protective oxide film is formed at the surface which inhibits corrosion [2]. However, implanted metallic materials are subjected to combined mechanical and electrochemical stresses in the joint. This raises concerns about the tribological and chemical effects on material degradation [3]. Previous studies have shown that adsorbed proteins at the metal surface influence the electrochemical behavior, acting on the dissolution mechanism of the alloy [4]. The effect of proteins in presence of additional mechanical stress on the release of metal ions and wear is still unknown.