Effects of solid solution treatment at different temperature on biological corrosion resistance of ZK60 magnesium alloy were investigated.The corrosion behavior of the alloy in the simulated body fluid（SBF）solution was evaluated by immersion test and electrochemical test.The microstructure and morphology of corrosion product were observed by OM（optical microscopy）and SEM（scanning electronic microscopy）.The compositions of corrosion product were analyzed by EDS.The results reveal that the second phase in the as-cast alloy is gradually dissolved after the solid solution treatment

and the potential difference between the matrix and the second phase is decreased

which reduces the tendency of the alloy galvanic corrosion and localized corrosion and improves the corrosion resistance of the alloy.The ZK60 alloy presents desirable biological corrosion resistance at solution temperature of 330℃

where its corrosion rate reaches 2.573 mm/a

and its corrosion current and corrosion potential are 0.205 mA/cm

2

and-1.504 V

respectively.