磷酸对氯乙烯-丙烯酸共聚物带锈涂层防腐性能的影响  

Effect of Phosphoric Acid on Corrosion Performance of Vinyl Chloride-acrylic Copolymer Coating on Rust Steel

作　　者：王思齐[1] 祝郦伟[2] 刘福春[1] 韩恩厚[1] 王震宇[1] 钱洲亥[2] 

机构地区：[1]中国科学院金属研究所环境腐蚀研究中心,沈阳110016 [2]国网浙江省电力公司电力科学研究院,杭州310014

出　　处：《中国腐蚀与防护学报》2016年第3期281-286,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：国家电网公司科技项目(zdk/gw001-2012)资助

摘　　要：制备了一种以氯乙烯-丙烯酸共聚物为成膜物质,磷酸作为转化剂的转化型带锈涂料,通过对添加不同质量分数磷酸的涂料样板进行盐雾实验、电化学测试及分析,研究了磷酸含量对带锈涂料性能的影响。通过涂层表面的微观分析,研究了磷酸与铁锈之间的反应情况。结果表明:磷酸主要与铁锈中较活泼的纤铁矿反应,将其转化为致密的磷酸铁膜对基底进行保护。添加10%磷酸的涂层在盐雾实验和电化学实验中较其他涂层表现出了最佳的综合耐蚀性能。A rust converter coating, using vinyl chloride- acrylic copolymer as film- forming substance and phosphoric acid as rust converter, was prepared on a rust Q235 carbon steel. Then the influence of the mass fraction of phosphoric acid on the coating performance was studied by means of salt spray tests and electrochemical impedance spectroscopy（EIS）. The reaction of phosphoric acid with the rust was examined through microscopic analysis of the surface morphology of the coating. The results showed that phosphoric acid can react with the lepidocrocite in the rust, forming a dense conversion layer on the steel. When the mass fraction of phosphoric acid in the coating is 10%, the property of the conversion layer showed better corrosion resistant performance than other coating samples with lower mass fraction of phosphoric acid.

关 键 词：带锈涂料 磷酸 锈转化剂 低表面处理涂料盐雾实验 电化学阻抗谱 

分 类 号：TG174[金属学及工艺—金属表面处理]