磷化助剂对铝合金磷化膜耐蚀性能的影响  

Investigating about the Effect of Phosphating Liquid on the Corrosion Resistant of Phosphating Film of Aluminium Alloy

作　　者：张春丽[1] 任广军[2] 

机构地区：[1]西藏大学理学院,西藏拉萨850000 [2]沈阳理工大学环境与化学工程学院,辽宁沈阳110159

出　　处：《有色矿冶》2013年第4期40-41,44,共3页Non-Ferrous Mining and Metallurgy

摘　　要：采用锌系磷化液在中温条件下对铝合金进行磷化处理获得磷化膜。通过电化学测试方法分别研究了磷化助剂磷酸二氢铁、硝酸镍、柠檬酸、磷酸含量的变化对该磷化膜耐蚀性的影响。结果表明,当磷酸二氢铁含量为4g·L-1、硝酸镍含量为1.5g·L-1、柠檬酸含量为1.5g·L-1、磷酸含量为3.5g·L-1时,铝合金磷化膜的耐蚀性最好。The electrochemical character of Zinc Phosphating Coating for aluminum alloy was studied by electrochemical tests. The influence of change in the content of Fe（H2PO4）2.2H2O, Ni（NO3）2.6H2O, H3C6H5O7 H3PO4, citric acid on the corrosion resistant of zinc phosphating coating was researched . The results showed that, when the combination is Fe（H2PO4）2.2H2O 4 g/L, Ni（NO3）2.6H2O 1.5 g/L, H3C6H5O7 1.5g/L, H3PO4, 3.5 g/L linear polarization resistance is max and the corrosion resistance is best.

关 键 词：铝合金 锌系磷化 线性极化电阻 耐蚀性 

分 类 号：TG174[金属学及工艺—金属表面处理]