▎ 摘　　要

NOVELTY - The method involves preparing a graphene-magnesium alloy base material. The surface of the graphene-magnesium alloy base material is pre-processed. The nano titanium dioxide powder and nano cerium powder are taken and mixed to form a suspension. The suspension is added into an electrophoretic deposition tank. The pre-treated base material is used as the cathode and carbon electrode is used as the anode to perform electrophoretic deposition to obtain a graphene-magnesium alloy biomedical material covered with a titanium dioxide coating. The biomedical materials are washed and dried to obtain finished materials. The magnesium alloy comprises 2-3 %mass aluminum, 0.5-1 %mass zinc, 0.2-0.5 %mass manganese, less than 0.1 %mass of other impurity elements and remainder of magnesium. USE - Method for preparing titanium dioxide coating on surface of medical graphene-magnesium alloy base material. ADVANTAGE - The method uses the graphene-magnesium alloy as base material, which has good mechanical property and wear-resisting property. The titanium dioxide coating is deposited on the graphene-magnesium alloy base material by electrophoresis deposition method without using high temperature, which avoids the micro-cracks in the titanium dioxide coating and improves the corrosion resistance of the material.