磷化处理对AZ31B镁合金表面耐蚀性能的影响  

In Vitro Corrosion Resistance of AZ31B Magnesium Alloy after Phosphating Treatment

作　　者：颜廷亭[1] 吴思宇[1] 陈庆华[1] 阳佳蓉 刘清梅[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《材料保护》2016年第5期5-7,22,共4页Materials Protection

基　　金：云南省教育厅科学研究基金项目(2014Y074);国家自然科学基金项目(31260228)资助

摘　　要：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9～22μm；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。For improving the corrosion resistance of AZ31 B magnesium alloy,the phosphate coating was successfully prepared on the surface.The SEM,XRD,electrochemical tests and immersion experiments in simulated body fluid were used to analyze the morphology,composition and corrosion resistance of phosphate coating.Results showed that the phosphate coating completely covered the surface of AZ31 B magnesium alloy,and there were some micro-cracks distributed in the coating.The coating was mainly composed of MgO,Mg_3(PO_4)_2 and Zn_3(PO_4)_2·xH_2O.Besides,the phosphate treatment could effectively improve the corrosion resistance of AZ31 B magnesium alloy in simulated body fluid.

关 键 词：AZ31B镁合金 磷化处理 耐蚀性能 

分 类 号：TG178[金属学及工艺—金属表面处理] R318.08[金属学及工艺—金属学]