氧化剂对钢铁表面氟铁酸盐转化膜的影响  

Effects of oxidants on fluoferrite conversion coatings on iron and steel substrates

作　　者：蔡丽丽[1] 郭瑞光[1] 牛林清[1] 马建青 唐长斌[1] 张建锋[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》2011年第5期31-34,共4页Electroplating & Finishing

基　　金：国家自然科学基金项目(20976143);陕西省教育厅专项科研计划(08JK324)

摘　　要：通过中性盐雾试验,研究了过氧化氢、钼酸钠、溴酸钾、碘酸钾和过硫酸铵等氧化剂对Q195冷轧钢表面所形成的氟铁酸盐转化膜耐蚀性的影响。结果表明,氧化剂为过硫酸铵时,形成的转化膜效果最好,其质量浓度为7g/L时,转化膜的耐盐雾时间可达到8h。过硫酸铵的加入使氟铁酸盐转化膜的形成加快,形成的无定形结构亦使得膜层耐蚀性能更好。The effects of oxidants,such as hydrogen peroxide,sodium molybdate,potassium bromate,potassium idiodate and ammonium persulfate,on anti-corrosion performance of fluoferrite conversion coating on cold-rolled Q195 steel were studied through neutral salt spray test.It was found that the performance of the conversion coating is the best when ammonium persulfate was used as oxidant.The time to failure in neutral salt spray test is 8 h for the conversion coating prepared with ammonium persulfate 7 g/L.The addition of ammonium persulfate accelerates the growth of conversion coating and improves the anti-corrosion performance due to the formation of amorphous structure.

关 键 词：冷轧钢 氟铁酸盐 化学转化膜 氧化剂 耐蚀性 

分 类 号：TG178[金属学及工艺—金属表面处理]