镀锌板硅烷-硝酸锆复合转化膜的性能与表征  

Performance and Characterization of Silane-Zirconium Nitrate Composite Conversion Coating on the Galvanized Sheet

作　　者：田飘飘[1] 徐丽萍[1] 张振海[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,安徽马鞍山243002 [2]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000

出　　处：《表面技术》2014年第1期71-76,共6页Surface Technology

基　　金：国家高技术研究发展计划(863计划)新材料研究专题(2009AA03Z529)~~

摘　　要：目的获得一种防腐性能优越的转化膜。方法将KH560和KH791两种硅烷复合后水解,添加硝酸锆,得到KH560-KH791-硝酸锆复合钝化液,采用该钝化液对镀锌钢板进行钝化处理,通过盐水浸泡实验、中性盐雾试验和附着力测试,与添加硝酸锆前的转化膜进行性能对比。结果盐水浸泡和中性盐雾腐蚀72 h的实验中,添加硝酸锆后的转化膜性能都明显优于添加前,二者的附着力测试均能达到一级。结论加入的硝酸锆填充了膜层空隙,更加有效地阻挡了腐蚀介质的渗透,使得钝化膜的防腐性能提高。Objective To get a conversion coating with superior anti-corrosion performance. Methods The KH560-KH791-zir- conium nitrate composite passivation solution was obtained by means of compositing and hydrolyzing two organic silanes followed by addition of zirconium nitrate. The solution was used on the galvanized sheet and the performances of the conversion coatings formed were comparatively characterized by salt water immersion testing, neutral salt spray testing and adhesion testing with the coatings prepared without adding zirconium nitrate. Results In the 72 h salt water immersion test and neutral salt spray test, the conversion coating prepared with the addition of zirconium nitrate was much better than that prepared without zirconium nitrate addition, and in both cases the adhesion test results reached Level 1. Conclusion the participation of corrosion inhibitor zirconium nitrate may fill the gaps in the coating, resulting in higher resistance to penetration of corrosive medium and further improvement of the anti-corro-sion performance of the passivated coating.

关 键 词：有机硅烷 复合转化膜 硝酸锆 耐蚀性 

分 类 号：TG174.46[金属学及工艺—金属表面处理]