碳钢表面铈盐钝化膜和铈盐·硅烷复合钝化膜的耐蚀性能  

Corrosion Resistance of Cerium Salt Passivation Film and Cerium Salt / Silane Composite Passivation Film on Carbon Steel Surface

作　　者：吴四伍[1] 雷亚红[1] 蔡焕青[2] 刘光明 林安[1] 

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430072 [2]中国电力科学研究院,湖北武汉430074 [3]湖北吴为涂料涂装有限公司,湖北武汉430065

出　　处：《材料保护》2015年第9期4-6,13,共4页Materials Protection

基　　金：国家电网公司科技项目(EPRIGYKJ[2012]8843号)资助

摘　　要：碳钢常规铈盐钝化膜的耐蚀性不够理想。以硝酸铈和过氧化氢配制钝化液,通过化学浸泡处理,在Q235碳钢表面制备铈盐钝化膜;通过KH-560硅烷偶联剂对铈盐钝化件进行二次封孔处理,制备了铈盐-硅烷复合钝化膜;对2种钝化膜试样进行了NSS,EIS,SEM和EDS测试。试验结果显示,铈盐钝化膜明显提高了基材的耐蚀性能,但是钝化膜表面存在一些微孔和裂缝,对其耐蚀性能造成不利影响;而硅烷膜能够完整覆盖和填充铈盐钝化膜表面的缝隙和微孔,改善了铈盐钝化膜的耐蚀性能。In this paper,cerium salt passivation film was prepared on the surface of carbon steel by chemical immersion in the passivation solution of cerium nitrate and hydrogen peroxide. Cerium salt passivation film was then sealed by KH-560 silane coupling agent to prepare the cerium salt / silane composite passivation film. Two kinds of passivation films were assessed by NSS,EIS,SEM and EDS tests. The experimental results showed that the corrosion resistance of the substrate was improved obviously by cerium salt passivation film,but there were some micro-pores and cracks on the surface of cerium salt passivation film,which had a negative effect on the corrosion resistance. However,the silane film could completely cover the cracks and fill micro-holes of the surface of the cerium salt passivation film,which further improved the corrosion resistance of cerium salt passivation film.

关 键 词：铈盐钝化 铈盐-硅烷复合钝化 碳钢 耐蚀性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]