钢铁表面氟铁酸钾转化膜技术研究  

Study of potassium fluoferrite conversion coating on steel surface

作　　者：魏肖艳[1] 郭瑞光[1] 蔡丽丽[1] 牛林清[1] 马建青 唐长斌[1] 张建锋[1] 杨晓冰[1] 

机构地区：[1]西安建筑科技大学西北水资源与环境生态教育部重点实验室,陕西西安710055 [2]西安华佳表面涂饰有限公司,陕西西安710066

出　　处：《电镀与涂饰》2010年第6期32-34,共3页Electroplating & Finishing

基　　金：国家自然科学基金项目(20976143);西安市科技计划项目(CXY08021)

摘　　要：在钢铁表面制得了氟铁酸钾转化膜,主要工艺流程包括酸洗、钝化、吹干和上漆。钝化液配方及工艺条件为:氟化钾100～130 g/L,浓硝酸70～80 mL/L,四价无机钛盐促进剂0.5～1.0 g/L,室温,pH 2～3,时间15～30 min。采用金相显微镜、EDS能谱和硫酸铜点滴试验等方法对膜的表面形貌、元素组成和耐蚀性进行了测试。结果表明,钢铁经此工艺钝化处理后其耐蚀性能及与基体和有机涂层的结合力明显提高。A potassium fluoferrite chemical conversion coating was prepared on the surface of steel. The process flow mainly includes pickling, passivation, blow drying, and painting. The passivation solution formulation and process conditions were presented as follows： KF 100-130 g/L, concentrated HNO3 70-80 mL/L, inorganic Ti（IV） salt promoting agent 0.5-1.0 g/L, room temperature, pH 2-3, and time 15-30 min. The surface morphology, element composition and corrosion resistance of the fluoferrite chemical conversion coating were tested by metallographic analysis, energy-dispersive spectroscopy and copper sulfate dropping test. The results showed that the corrosion resistance and adhesion to steel and organic coating are improved greatly after passivation.

关 键 词：钢铁 化学转化膜 氟铁酸钾 耐蚀性能 

分 类 号：TG178[金属学及工艺—金属表面处理]