Biotribology and biocorrosion of MWCNTs-reinforced PEO coating on AZ31B Mg alloy

Abstract Over the last two decades, various methods have been developed for surface modification of Mg alloys among which plasma electrolytic oxidation (PEO) is one most effective tailoring properties. However, PEO coatings still need to be improved in aspects, including mechanical and corrosion performances. In current study, multi-walled carbon nanotubes (MWCNTs) were incorporated into a coating structure via one-step process. Characterization techniques this study included scanning electron microscopy (SEM), Raman spectroscopy X-ray diffraction (XRD). Corrosion behavior was evaluated by electrochemical tests taking account quasi-in vivo conditions order get closer implant degradation rates human body. Dry-wear tribocorrosion SBF also reciprocal ball-on-plate mode. According findings, MWCNTs induced several microstructural modifications such as formation ~ 1 ?m homogeneous dense barrier layer irregular-shape porosities. Reinforcement significantly pitting resistance coating, yielded low friction coefficient decreased wear-related damage 60%.