Controllable Degradable Plasma Electrolytic Oxidation Coated Mg Alloy for Biomedical Application

A controllable degradable coating on Mg alloy based plasma electrolytic oxidation (PEO) process is reported for the first time. The results show that introduction of silica nanoparticles into PEO electrolytes leads to their reactive incorporation in coatings and thus influencing degradation behavior. Dissolution amorphous phases facilitates chemical reaction with components simulated body fluid, resulting self-healing effect via redeposition insoluble conversion products. dynamic balance between dissolution original reconstruction corrosion layer mainly determined by phase composition as well surrounding corrosive medium.