以合成的水性有机硅改性硅溶胶为基料,在铝合金表面制备了一种具有良好理化性能的不燃有机-无机复合涂层.通过对底涂层附着力、耐冲击性以及涂层表面形貌的对比,确定底层涂料的颜基比(P/B)为1 :1～1.5:1时,底涂层具有良好的理化性能,制备过程中不易产生细裂纹.SEM观察形成的底涂层致密性差,喷涂纳米面漆后涂层平整,致密.EDS分析表明底涂层的厚度在30μm左右,其中存在5-10μm的过渡层.火焰燃烧测试表明涂层(底涂层+面层)遇明火高温不燃、不脱落、无炭化,而是形成一种釉状层与铝合金基体牢固地结合在一起;XRD分析证明燃烧前后涂层材料主要物相没有发生明显改变.除耐沸水性、耐高温性外,涂层的理化性能按照国家标准GB 12441-2005检测,结果表明涂层具有良好的理化性能,能够满足铝合金表面高装饰、高防护的性能要求.
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