作为-种有机-无机杂化材料,倍半硅氧烷(SSO)近年来被发现其具有良好的防腐性能,并有望成为传统的防腐材料-铬酸盐转化膜的替代物.本文用乙烯基三甲氧基硅烷(VMS)通过溶胶凝胶法制得了SSO,并涂敷于LY12铝合金表面.用(EIS)对不同水解时间下制得的VMS膜层的结构进行了表征.水解3d所获得的VMS在不同固化时间下的EIS谱图上出现了一个新的时间常数,证实了在VMS膜层与铝合金基体之间产生了一个新的中间层.根据实际的可能性,该层包含Al-O-Si,膜层与基体以化学键合;然而,完全水解的VMS膜层的EIS谱图中没有这个新的时间常数.不同水解时间的VMS膜层的EIS谱图表明为获得致密的膜层且与基体间以化学键合,VMS需在本文反应条件下水解3d.
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