AZ31镁合金表面锰盐-氟锆酸盐复合转化膜的制备及性能  

Preparation and Properties of Manganese-Fluorozirconate Composite Conversion Coating on AZ31 Magnesium Alloy Surface

作　　者：曹铁华[1] 柴瑞杰 黄红艳[2] 成旦红[3] 叶根[2] 

机构地区：[1]上海大学环境与化学工程学院,上海200444 [2]上海大学理学院,上海200444 [3]上海电力学院环境与化学工程学院,上海200090

出　　处：《上海大学学报（自然科学版）》2013年第5期470-473,共4页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(21107067)

摘　　要：采用AZ31镁合金为基体材料,经机械抛光、碱洗、化学转化等工序,在其表面形成致密的复合转化膜.采用扫描电子显微镜(scanning electron microscope,SEM)观察表面形貌和能谱分析(energy dispersive analysis,EDS)转化膜的成分,通过Tafel曲线和点滴腐蚀试验评定转化膜的耐蚀性.结果表明,转化膜由镁、铝、氧、磷、锌及少量的锰和锆元素组成,转化膜结合力和耐蚀性较好.A new chromium-free conversion coating on magnesium alloy was prepared. A cast magnesium alloy AZ31 series was used as the raw material. Compact chemical conversion coating was formed on the surface after mechanical polishing, alkaline washing, and chemical conversion. Surface morphology and composition of the coating were analyzed with a scanning electronic microscopy （SEM）. Energy dispersive analysis （EDS） Tafel curves and drop corrosion test were used to evaluate the corrosion resistance of the conversion coating. The results show that compositions of coating are magnesium aluminum, oxygen, phosphorus, zinc, manganese and zirconium, and the coating has good adhesion and corrosion resistance.

关 键 词：镁合金 转化膜 耐蚀性 电化学 

分 类 号：TQ153.2[化学工程—电化学工业]