热镀锌层柠檬酸改进型铈盐转化膜工艺  

Cerium salt conversion coating improved by citric acid on hot-dip galvanized layer

作　　者：孔纲[1] 孙子文[1] 吴双[1] 车淳山[1] 宿孝涛 贺光宗 黄永利 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]潍坊长安铁塔股份有限公司,山东潍坊262100

出　　处：《电镀与涂饰》2012年第8期21-24,共4页Electroplating & Finishing

基　　金：国际铅锌研究组织项目(ILZRO/IZA/2009023);中央高校基本科研业务费专项资金项目(2012ZM0011)

摘　　要：研究了热镀锌层柠檬酸改进型稀土铈盐转化膜工艺，探讨了工艺条件对转化膜耐蚀性的影响。通过正交试验和单因素试验得到柠檬酸改进型稀土铈盐转化膜的最佳工艺为：Ce（NO3）3·6H2O25～30g／L，H2O24～6mL／L，柠檬酸20g／L，处理温度70℃，处理时间10min。经柠檬酸改进后的铈盐转化膜耐蚀性能明显优于常规铈盐转化膜。The process of cerium salt conversion coating improved by citric acid on hot-dip galvanized layer was studied. The effects of process conditions on corrosion resistance of the conversion coating were discussed. The optimal process parameters obtained by orthogonal and single factor experiment are as follows： Ce（NO3）3·6H2O 25-30 g/L. H2O2 4-6 mL/L, C6H8O7·H2O 20 g/L, treatment temperature 70 ℃, and treatment time 10 min. The corrosion resistance of cerium salt conversion coating improved by citric acid is obviously superior to that of conventional cerium salt conversion coating.

关 键 词：热镀锌 转化膜 铈 柠檬酸 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TQ153.15[金属学及工艺—金属学]