为避免铬酸盐处理铝合金造成环境污染,以环境友好的γ-缩水甘油醚丙基三甲氧基硅烷(GPTMS)和正硅酸乙酯(TEOS)为原料,用溶胶-凝胶法在室温下制备有机-无机杂化溶胶,经浸涂并室温固化后在铝合金表面形成涂层.通过X射线衍射、反射吸收红外光谱、腐蚀测试技术(盐雾试验和动电位扫描)和标准胶带方法对涂层的结构、耐腐蚀性及粘结力进行了分析和测试,结果表明,由于形成了致密的非晶态涂层,同时涂层和基体界面之间形成了稳定的Ai-O-Si化学键,该涂层具有优异的耐腐蚀性能和强的结合力.
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