【摘要】 近年来发展的硅烷偶联化预处理技术因其对环境友好、可操作性强,有望成为金属表面铬钝化处理的替代工艺。硅烷膜作为金属表面预处理层,不但改善了基材表面的状态,增强了涂料与基材间的黏附性能,也可作为单独的防护涂层,对腐蚀介质的渗透起着物理屏障作用。主要从3个方面介绍了硅烷偶联剂在金属表面预处理中的研究进展:(1)金属表面硅烷偶联化机理;(2)金属基材表面状态、硅烷水解体系、硅烷成膜方式及膜固化方式等工艺对膜性能的影响;(3)硅烷预处理技术研究的新进展,包括传统浸渍成膜、电沉积辅助法制备硅烷膜及无机稀土金属盐、纳米颗粒、缓释剂掺杂制备的硅烷杂化膜的研究现状。更多还原

【Abstract】 In recent decades,silane-coupling agents,with special molecular bridging structure to linking organic and inorganic substance,are emerged remarkably for metal pretreatments,which can both achieve corrosion protection and adhesion properties. This paper mainly introduced three aspects of the research progress of application of silane coupling agents in metal pretreatments. First,the reaction mechanism of silane and metal substrates was introduced. Second,the influence of film formation technology to silane films such as pretreatment process of base material,concentration of silane,hydrolysis degree of silane,p H value of silane solution,curing time and curing method,was discussed. Third,the newest research progress of silane pretreatment was particularly presented,including the impregnated film,electrodeposition-aided preparation of silane films and silane hybrid films doped by inorganic rare earth metal salts,nanoparticles or slow-release agents.更多还原