镀锌层无铬硅酸盐彩色钝化成膜机理及性能  

Formation mechanism and properties of non-chromium color passivation for zinc coating

作　　者：范云鹰[1] 金海玲[1] 崔欢欢[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《江苏大学学报（自然科学版）》2015年第2期220-223,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助面上项目(51361018)

摘　　要：针对镀锌层可显著提高钢铁零件的耐蚀性能,但在潮湿的环境中其表面易被腐蚀产生白锈,从而失去对基体的保护作用的问题,制备了A3钢镀锌层表面的无铬硅酸盐彩色钝化膜,以进一步提高其耐蚀性能,并使用X射线光电子能谱(XPS)、扫描电镜(SEM)、中性盐雾试验和电化学工作站,研究了膜层的组分、成膜的过程及耐蚀性能.研究结果表明:钝化膜的主要成分为Zn4Si2O7-(OH)2·2H2O,Si O2,Zn O和Zn(OH)2,其中性盐雾试验出白锈时间能够达到75 h,与市场上广泛应用的三价格(Cr3+)钝化膜相当.Galvanization can significantly improve corrosion resistance property of steel. However,the easy corrosion in humid environment can lead to losing protection to steel. In order to improve the corrosion resistance property,the chromium-free silicate color passivation film was prepared on A3 steel with galvanized layer. X-ray photoelectron diffraction spectra（ XPS）,scanning electron microscopy（ SEM）,electrochemical work station and neutral salt spray tests were used to investigate the composition,forming process and corrosion resistance. The results show that the obtained passivation film consists of Zn4Si2O7（ OH）2·2H2O,Si O2,Zn O and Zn（ OH）2. The neutral salt spray test can reach 75 hours,which is equal to commercial Cr3 ＋passivation.

关 键 词：镀锌层 硅酸盐 成膜过程 成分 耐蚀性能 

分 类 号：TG147.44[一般工业技术—材料科学与工程]