镀锌钢硅酸盐及硅烷钝化机理的研究进展  

Research progress of silicate and silane passivation mechanisms for galvanized steel

作　　者：孔纲[1] 汤鹏[1] 张双红[1] 车淳山[1] 林志坚 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]厦门产业技术研究院,福建厦门361024

出　　处：《电镀与涂饰》2014年第3期120-123,共4页Electroplating & Finishing

基　　金：国际铅锌研究组织资助项目(ILZRO/IZA/CN201212);中央高校基本科研业务费项目(2012ZM0011);广东省教育部产学研结合项目(2012B091100312)

摘　　要：从无机硅钝化和有机硅钝化两个方面综述了国内外镀锌钢硅酸盐及硅烷钝化机理的研究进展。其中,无机硅钝化又分为酸性硅酸盐钝化和碱性硅酸盐钝化,有机硅钝化主要是硅烷(偶联剂)钝化。研究表明,碱性硅酸盐钝化和硅烷钝化的机理大致相似,都是钝化液中硅羟基与基体表面的羟基发生脱水缩合而形成钝化膜,酸性硅酸盐钝化的机理则有待进一步研究。提高含硅钝化的耐蚀性和溶液维护是今后研究的热点。The research progress of silicate and silane passivation mechanisms of galvanized steel was summarized from two aspects of inorganic silicate passivation （including acidic silicate passivation and alkaline silicate passivation） and organic silane passivation （mainly using silane coupling agents）. It was shown that the mechanism of alkaline silicate passivation is similar to that of silane passivation. The passivation coating on galvanized steel is formed through the dehydration-condensation reaction between the hydroxyl groups carried by silicon atoms in passivation solution and the hydroxyl groups on the surface of substrate. The mechanism of acidic silicate passivation remains to be further studied. The improvement of corrosion resistance of silicon-containing passivation film and the bath maintenance are the research hotspots in the future.

关 键 词：镀锌钢 钝化 硅酸盐 硅烷 机理 

分 类 号：TG174.45[金属学及工艺—金属表面处理]