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To solve the problem of rapid degradation of magnesium alloy implanted in human body, the surface of magnesium alloy was modified by micro-arc oxidation treatment. In order to improve the comprehensive mechanical properties and corrosion resistance of magnesium alloy materials, a new type of Mg-Zn-Y-Nd-Ca degradable magnesium alloy materials was formed by adding a certain proportion of rare earth elements Y and Nd, as well as Zn and Ca. A micro - arc oxidation layer containing Ca, P and Si was formed on the surface of magnesium alloy by secondary micro - arc oxidation. The surface of the micro-arc oxidation film was covered by sol-gel technology to reduce the micro-crack and micro-pore structure of the film and improve the corrosion resistance of the film in the human body simulation liquid.

Study on Micro-arc Oxidation of Mg-Zn-Y-Nd-Ca Magnesium Alloys