Improvements in tribological and anticorrosion performance of porous Ti-6Al-4V via PEO coating

Abstract Medical implants manufactured using biomaterial Ti-6Al-4V exhibit some disadvantages. Its higher elastic modulus than that of natural bone can cause stress shielding problems. This be avoided with pores in the implant structure. However, poor corrosion and tribocorrosion behaviors are yielded because large area exposed to medium. To mitigate both issues, coating technologies applied. The plasma electrolytic oxidation (PEO) process is a cost-effective has been used successfully nonporous Ti alloys. In this study, two PEO coatings different amounts Ca/P used. reports regarding their application porous materials scarce. effects treatments on powder metallurgy analyzed herein. provide an efficient surface for coatings, as demonstrated via scanning electron microscopy (SEM) atomic force (AFM), porosity substrates improved adherence coatings. resistance measured electrochemical impedance spectroscopy confirmed beneficial effect particularly long exposure time. lower roughness, small pore size, more compact film observed PEO-Ca/P sample resulted favorable tribological properties.