热浸镀Zn-Al合金钝化工艺及耐蚀性能研究  

Investigation of Passivation Technology and Corrosion Resistance for Molybdate Passivation Film Formed on Zn-Al Galvanized Steel Sheet

作　　者：王建[1] 周婉秋[1] 施耀萍[2] 康艳红[1] 盛莉[1] 王波[1] 

机构地区：[1]沈阳师范大学化学与生命科学学院,辽宁沈阳110034 [2]天津市轻工装备研究所,天津300193

出　　处：《电镀与精饰》2012年第3期6-9,共4页Plating & Finishing

基　　金：沈阳师范大学博士启动基金项目(BS200816)和实验中心主任基金资助项目(SYZX1103)

摘　　要：在钢板热浸镀Zn-5%Al合金表面制备了钼酸盐钝化膜,探讨了溶液pH、θ及t对钝化膜性能的影响。采用电化学方法对钝化膜耐腐蚀性能进行测试。结果表明,Zn-5%Al合金钝化膜阳极极化曲线呈现钝化特征。用扫描电镜对钝化膜的表面形貌进行观察,发现钝化膜呈片层状结构,用环境扫描电镜配套的能谱仪对钝化膜成分进行分析,结果表明钝化膜由Mo、P、O、Zn和Al等元素组成。Molybdate passivation film was prepared on the surface of Zn-5%Al galvanized steel sheet.Effects of bath pH,treatment temperature and time on the film properties were discussed.Corrosion resistance of the passivation film was studied by electrochemical method.Results showed that anodic polarization curve of the passivation film presented in passivation characteristics.Surface morphology of the passivation film was observed by environmental scanning electron（SEM）,and it was found that the passivation film formed on Zn-5%Al galvanized steel sheet presented in lamellar structure.Composition of the passivation film was analyzed by energy diffraction X-ray（EDX） and result indicated that the passivation film was composed of Mo,P,O,Zn and Al.

关 键 词：Zn-Al合金镀层 钼酸盐钝化膜 耐蚀性 

分 类 号：TG174.45[金属学及工艺—金属表面处理]