氟钛酸改性复合有机硅烷钝化膜及膜层性能研究  

The Fluorine Titanate Modified Organic Silanes Passivation Film and It's Properties for Galvanized Steel Surface Coating

作　　者：田飘飘[1] 张振海[1] 徐丽萍[1] 杨兴亮[2] 张千峰[1] 

机构地区：[1]安徽工业大学分子工程与应用化学研究所,马鞍山243002 [2]马鞍山钢铁股份有限公司技术中心,马鞍山243000

出　　处：《表面技术》2013年第3期33-37,共5页Surface Technology

基　　金：科技部863计划新材料研究专题(2009AA03Z529)

摘　　要：通过氟钛酸改性KH858+KH580混合硅烷,配制出无铬钝化液,将其涂覆在热镀锌板上,经烘干、固化,形成无铬钝化膜。测定了钝化膜的厚度、附着力和硬度;通过中性盐雾试验,研究了钝化膜的耐化学腐蚀性能;通过Tafel极化曲线和EIS图谱,表征了钝化膜的耐电化学腐蚀性能。结果表明:钝化膜的平均厚度为5.2μm,附着力测试的被剥离面积为3%,硬度为3H,均满足国家标准,符合工业生产要求;此外,钝化膜的耐化学腐蚀和耐电化学腐蚀性能优良,相比于改性前,其性能有较大提高。The chrome-free passivation film was made from mixed silane KH858 and KH580 modified by fluorine titanate,which was coated on the surface of hot dip galvanized steel following drying and curing.The thickness,adhesion,hardness of film were tested;The neutral salt spray testing was done to research the resistance to chemical corrosion of the passive film.The anti-electrochemical resistance of the surface film was characterized by using Tafel polarization curves and electrochemical impedance spectrum techniques.The results showed that the average film thickness was 5.2 μm,the film stripped area was 3% and the film hardness was 3H,which may meet with the national standard and industrial production requirements.Furthermore,the film＇s anti-corrosion to chemistry and electrochemistry was excellent.The performance of organic silane composite passivation film modified by fluorine titanate was obviously better than the film without any modification.

关 键 词：镀锌钢板 氟钛酸 有机硅烷 钝化膜 耐腐蚀性能 

分 类 号：TG174.46[金属学及工艺—金属表面处理]