为了进一步提高生物医用AZ31B镁合金的耐蚀性能,在其表面制备磷化膜.采用扫描电镜、X射线衍射仪、电化学分析及模拟体液浸泡腐蚀试验分析了磷化膜的形貌、组成及耐蚀性.结果表明:磷化膜完整地分布在AZ31B镁合金表面,膜层中无规分布着微裂纹,膜厚约为9～22 μm;膜层主要成分包括MgO、Mg3(PO4)2及Zn3(PO4)2·xH2O;磷化处理能有效提高AZ31B镁合金的耐模拟体液腐蚀性能.
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