采用溶胶-凝胶法,以正硅酸乙酯(TEOS)为无机相前驱体,甲基三乙氧基硅烷(MTES)和二甲基二甲氧基硅烷(DDS)为有机相前驱体,盐酸和水为催化剂,通过水解-缩聚反应制备了有机硅/SiO2有机-无机杂化溶胶.在100℃下经12h烘干得到有机硅/SiO2杂化涂层,红外光谱研究表明:有机、无机两相组成了强相互作用的复合体系.采用电化学阻抗(EIS),研究了杂化溶胶制备的涂层在3.5%NaCl溶液中浸泡不同时间的阻抗行为.并根据阻抗谱特征建立了等效电路,结合等效电路图及拟合结果,分析了杂化涂层在3.5%NaCl溶液中浸泡不同时间的耐蚀性.研究结果表明:在3.5%NaCl溶液中,有机硅/SiO2杂化涂层具有良好的耐蚀性.
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