In this work, the influence of exposure time in electrolyte during microarc oxidation Mg-Ca-Zn alloy on structural-phase composition and biodegradation is studied. The test results showed that 5 min. not enough to form a uniform coating. coating amorphous consists elements O, P, Mg with F-based inclusions. It has been established formed coatings successfully reduce alloy, as evidenced by signif...