As magnesium is an essential element for the human body,magnesium alloys are expected to be promising implanted materials despite their lower corrosion resistance.The most potential advantages of magnesium lie on both excellent biocompatibility and good mechanical properties.A Tio2 coating had been successfully deposited on the surface of AM60 sample by using a thermal spray technique and then was sealed with sodium silicate.The corrosion behaviors were investigated by using the potentialdynamic electrochemical technique.It is demonstrated that the TiO2 coating has a porous ceramic structure (shown in Fig.1).The thickness and micro hardness of the layer reached 40 μm and 886 HV,respectively.The polarization curves exhibited that the corrosion resistance of AM60 with TiO2 coating in Hanks solution was not improved compared to that of the alloy without the coating.However,the corrosion rate of the coating sealed with sodium silicate was significantly reduced (shown in Fig.2).