镀锌钢板表面有机硅烷钝化膜的耐蚀性研究  

Corrosion Resistance of Organosilane Passive Film Formed on Galvanized Steel

作　　者：龚利华[1] 朱玉巧[1] 程东亮[1] 

机构地区：[1]江苏科技大学材料科学与工程学院,镇江212003

出　　处：《表面技术》2011年第1期34-36,85,共4页Surface Technology

摘　　要：通过极化曲线和交流阻抗测试技术,对比研究了镀锌钢板经单一BTESPT溶液处理、经添加铈盐的BTESPT溶液处理、先经γ-APS预处理再经添加铈盐的BTESPT溶液处理所得3种有机硅烷钝化膜的耐蚀性。研究发现:有机硅烷成膜过程中添加一定量的铈盐,可通过其形成的三价和四价氧化物,修复单一硅烷膜存在的缺陷,从而提高防护效果;而经过γ-APS预处理,可通过增加膜的致密性,进一步显著改善材料的耐蚀性。The corrosion resistances of passive film formed on the galvanized steel by the solution of single bis-（3-（triethoxysilyl）propyl）tetrasulfide（BTESPT）,BTESPT added cerium ion and pre-treated by γ-APS were studied by polarization curve and alternating current impedance tests.The results show that the corrosion protection of the film can be improved by adding cerium nitrate to the silane solutions which can block small defects and cracks in the film by trivalence and quadrivalence cerium oxide formed in the film.In particular,the composite film pre-treated by γ-APS shows more effective corrosion protection by increasing the film compactness.

关 键 词：有机硅烷 钝化膜 耐蚀性 镀锌钢板 

分 类 号：TG174.451[金属学及工艺—金属表面处理]