锌锰系电解磷化膜工艺的研究  

Study on Zinc-Manganese Electrolytic Phosphating Process

作　　者：郝建军[1,2,3] 王崇蕊[1] 刘新院[1] 董春艳[1] 崔媛媛[1] 张丽丽[1] 

机构地区：[1]沈阳理工大学环境与化学工程学院,辽宁沈阳110159 [2]重庆建设工业(集团)有限责任公司,重庆400054 [3]东北大学材料与冶金工程学院,辽宁沈阳100004

出　　处：《电镀与精饰》2012年第2期17-20,共4页Plating & Finishing

摘　　要：在锌锰系电解磷化液中,采用外加电流的方法对工件进行磷化处理,研究了电解磷化工艺对磷化膜性能的影响规律,通过硫酸铜点滴和盐雾试验,电化学方法及扫描电子显微镜和X-射线衍射仪等对电解磷化膜耐蚀性能、微观形貌和膜层成分进行了研究。结果表明,经过电解磷化后,可得到结晶致密的针形结构的电解磷化膜,膜层主要由Mn2Zn(PO4)2、Fe3(PO4)2和MnHPO4.3H2O等成分组成,电解磷化膜经过24 h中性盐雾试验无锈蚀。Influence of electrolytic phosphating process on phosphate coating performance was studied by applying current to workpiece in zinc-manganese electrolytic phosphating solution.Corrosion resistance,crystal morphology and composition of the coating were analyzed by copper sulfate dropping test,neutral salt spray test,electrochemical measurements,scanning electron microscope（SEM） and XRD method.Results showed that a compact phosphate coating with needle-shaped structure was formed after electrolytic phosphating and the coating was mainly composed by Mn2Zn（PO4）2,Fe3（PO4）2,and MnHPO4·3H2O.After 24 h neutral salt spray test there was no corrosion in the coating.

关 键 词：电解磷化 耐蚀性 锌锰系 磷化膜 

分 类 号：TG174.45[金属学及工艺—金属表面处理]