文献类型：期刊文献

中文题名：6061铝合金表面无铬稀土镧转化膜性能的研究

英文题名：Research on Performance of Chrome-free Rare Earth Lanthanum Conversion Coating on 6061 Aluminum Alloy Surface

作者：李红玲[1];刘清玲[1]

第一作者：李红玲

机构：[1]新乡学院化学与化工学院

第一机构：新乡学院化学化工学院

年份：2013

卷号：42

期号：3

起止页码：42-45

中文期刊名：表面技术

外文期刊名：Surface Technology

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD_E2013_2014】；

基金：河南省科技攻关重点项目(122102310321)

语种：中文

中文关键词：铝合金;转化膜;无铬;稀土;耐蚀性;结合力

外文关键词：aluminum alloy ; conversion coating ; chrome-free ; rare earth ; corrosion resistance ; adhension

摘要：利用极化曲线方法,研究了以La(NO3)3.6H2O为促进剂的磷酸盐转化膜的耐蚀性,同时与铬磷化膜及无稀土促进的单纯磷酸盐膜的耐蚀性进行了对比;通过划格法和全浸腐蚀试验,研究了这三种转化膜与有机涂层间的结合力。结果发现:与单纯磷酸盐膜相比,稀土促进生成的磷酸盐膜中的传输阻力增加,耐蚀性明显增强,而与铬磷化膜相比,二者在弱极化区的耐蚀性能相近;稀土促进生成的磷酸盐膜与有涂层间的结合力明显优于铬磷化膜。
The anti-corrosion of the conversion coming which is formed by LaLa（NO3）3·6H2O was evaluated with polar-ization curve, and also compared the chromium phosphate fihn and non-rare phosphate conversion coating. Adhesion force be-tween the conversion coatings and the organic coating were studied through crossing grid method and immersing corrosion test. The results showed that the transmission resistance of conversion coating with rare earth additive was increased by comparing with non-rare phosphate conversion coating; The anti-corrosion of the conversion coating was increased noticeably. But compa- ring with chromium phosphting, in the weak polarized scope, both of the corrosion resistances were close. Adhesion force be- tween the conversion coating with rare earth as additive and the organic coating was obviously superior to that of chromate phos- phate process.