In-vitro assessments of micro arc oxidized ceramic films on AZ31 magnesium implant : Degradation and cell-surface response

In this research, phosphate and silicate based ceramic films were synthes ized via micro arcoxidation (MAO) method on the surface of the magnesium alloy. With the aim of orthopedic applicationof these coatin gs, corrosion behavior of them was investigated by potentiodynamic polarization andelectrochemical impedance spectroscopy in simulated body fluid (SBF) environment. The results indicatedbetter corrosion resistance of the phosphate fi lm compared to the silicate fi lm. Moreover, based onimmersion tests, less pH and weight changes were obtained for the phosphate coating. Osteosarchoma(G292) Cell response of the coated specimens showed better cell morphology on the surface of thephosphate fi lm than silicate fi lm after 6 and 24 h of culture. This was related to the more surfaceroughness and less degradation rate of the phosphate film compared with silicate coating.