钡盐改性常温锌系磷化液研究  

Research of Zinc Species Phosphating Solution Modified with Barium Salt at Ambient Temperature

作　　者：余取民[1] 杨建[1] 许第发[1] 

机构地区：[1]长沙学院生物工程与环境科学系,湖南长沙410003

出　　处：《材料保护》2007年第5期34-36,共3页Materials Protection

基　　金：湖南省科技攻关项目(2006GK3070)

摘　　要：通过氯化钠溶液浸泡、扫描电镜及能谱仪(SEM+EDS)检测方法,研究了硝酸钡、SO24-对常温锌系磷化膜形貌、性能和磷化过程的影响。结果表明,磷化液中的SO24?会进入磷化膜,且不能通过水洗磷化膜清除,明显影响锌系磷化膜的性能,甚至引起磷化液报废;添加[Ba2+]≤0.9g/L可有效除去磷化液中的SO42?,改变磷化膜的组成并提高磷化膜的耐蚀性能。The zinc species phosphating process at ambient temperature and the morphologies and properties of the phosphating coatings were analyzed by means of scanning electron microscopy,energy dispersive spectroscopy,and corrosion test in NaCl solution,which was aiming at revealing the effects of barium nitrate and SO2-4 on the anticorrosion behavior of the phosphating coating and the phosphating process as well.It was found that SO2-4 in the phosphating bath was incorporated into the phosphating coating and was unable to be removed by rinsing,which was harmful to the properties of the phosphating coating and could even lead to failure of the phosphating bath.Fortunately,the SO2-4 in the phosphating bath could be effectively removed by the introduction of Ba2+ at a concentration of ≤0.9 g/L,which helped to modify the composition and increase the anticorrosion behavior of the phosphating coating.

关 键 词：磷化 硝酸钡 SO4^2- 常温 改性 

分 类 号：TG174.42[金属学及工艺—金属表面处理]