硫代乙酰胺对镀锌钢表面铈盐转化膜耐蚀改性的影响  

Influence of Thioacetamide on Corrosion Resistance of Cerium-Salt Conversion Coating on Galvanized Steel

作　　者：董恒莉 郭瑞光[1] 

机构地区：[1]西安建筑科技大学西北水资源与环境生态教育部重点实验室,陕西西安710055

出　　处：《材料保护》2016年第6期31-34,6,共4页Materials Protection

基　　金：国家自然科学基金项目(20976143);无锡市创新基金项目(CBE01G1456)资助

摘　　要：为了提高镀锌钢表面铈盐转化膜的耐蚀性能,添加硫代乙酰胺对其进行改性,采用扫描电镜(SEM)、能谱(EDS)、中性盐雾(NSS)和极化曲线对铈盐转化膜改性前后的形貌结构、成分和耐蚀性能进行分析测试。结果表明:硫代乙酰胺的加入大大增加了铈盐转化膜的反应时间和膜层厚度以及转化膜有效耐蚀成分O,P,Ce的含量,使得试片耐中性盐雾腐蚀时间由改性前的24 h提高到改性后的288 h,铈盐转化膜的耐蚀性显著提高。Thioacelamide was added to modify the corrosion resistance of cerium-salt conversion coating on galvanized steel.The scanning electron microscope(SEM),energy dispersive spectrometer(EDS),neutral salt spray(NSS) and polarization curve analysis were used to study the morphology,composition and corrosion resistance of cerium- salt conversion coating before and after modification.Results showed that the addition of thioacetamide greatly increased reaction time and thickness of cerium-salt conversion coating,and the content of effective anti-corrosion composition O,P and Ce was improved,which led to the increase of salt spray time from 24 h to 288 h,and the corrosion resistance of cerium- salt conversion coating was improved significantly.

关 键 词：镀锌钢 铈盐转化膜 硫代乙酰胺 改性 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]