现有的医用镁及镁合金在植入人体后耐蚀性能较差.采用高锰酸盐在医用AZ31B镁合金表面制备氧化锰转化膜,并采用SEM、XRD、电化学测试及浸泡试验研究其性能,对膜的形貌、组分、电化学性能和耐体液腐蚀性能进行了探讨.结果表明:氧化锰转化膜均匀分布在AZ31B镁合金表面,无规则分布有微裂纹,膜厚约52～165μm;转化膜的主要成分包括MgO,MnO,MnO2,Mn2O3和Mn3O4;转化膜能够有效改善AZ31B镁合金的体外耐蚀性能.
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