摘要
采用盐水浸泡与通电实验、自然电位时效变化等电化学测试手段并用的方法,考察了颜料体积浓度(PVC)及三聚磷酸铝含量对水性乳胶涂料耐蚀性的影响。结果表明,随着颜料体积浓度与临界体积浓度(CPVC)的比值(PVC/CPVC)及三聚磷酸铝含量的增加,涂层的耐蚀性有增加的趋势;当PVC/CPVC为0.9,三聚磷酸铝含量为40%时,涂层的耐蚀性最佳;含有三聚磷酸铝的涂层后期缓蚀作用加强,前期防锈主要依赖于乳胶涂膜的屏蔽作用。实验结果还表明,盐水浸泡实验和电化学测试结果有较好的相关性,说明这些方法都可以用来探讨金属的腐蚀防护机理。
Salt immersion test and electrochemical measurements were performed to evaluate the paints anticorrosion. The results present that anticorrosion increases with the paint volume concentration(PVC) and the crital volume concentration(CPVC) ratio (PVC/CPVC) and aluminium triphosplate content increased; 30% alumimium triphosplate and a PVC/CPVC of (0.9) present the best anticorrosive performance; paints pigment with aluminium triphosplate show better antirust properties with time, but the antirust at the beginning of test depends on barrier effect of coating; good correlation was found among salt immersion test and electrochemical assays, these may help in elucidating the corrosion protection mechanism.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2005年第1期260-263,共4页
Polymer Materials Science & Engineering
关键词
三聚磷酸铝
颜料体积浓度
水性防锈涂料
电化学测试
aluminium triphosplate
pigment volume concentration
water-borne antirust paint
electrochemical measurement
