有机无机杂化涂料在较高温度下固化时,涂层的湿附着力好.采用有机无机组分适当配比、提高固化温度、电泳涂装和加入片状颜料都能够降低杂化涂层的通透性,从而提高防腐蚀性能.有机缓蚀剂和铈离子被用于替代高毒性六价铬盐钝化颜料.为能起长效的保护作用,把有机缓蚀剂存储在β-环糊精的内腔中形成复合物,或把有机缓蚀剂填充在多水高岭土管腔中,再覆盖上聚电解质层进行LBL自组装,然后加到杂化涂料中.存储的缓蚀剂在腐蚀过程中受到pH值的变化时再恢复活性.电化学测试表明:这种方法加入缓蚀剂的杂化涂层所能达到的防腐蚀性能已经远超过六价铬盐保护的水平.有机无机杂化涂料中新发展的超疏水性涂层,因其强烈的憎水性能,能降低水的通透性,在金属防腐蚀领域有应用前景.
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