为了开发绿色环保的热镀锌钢板钝化工艺,将γ-(2,3-环氧丙氧)丙基三甲氧基硅烷(KH560)和γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)复合,再添加30％双氧水改性的氟钛酸制成复合钝化液对镀锌钢板钝化,并制备了有机硅烷钝化膜以比较.通过红外光谱分析膜层的分子结构,并用电化学Tafel极化曲线、交流阻抗谱(EIS)、中性盐雾试验、盐水浸泡试验等测定了膜层的耐蚀性能.结果表明:与有机硅烷膜相比,有机硅烷-氟钛酸复合膜具有更好的致密性和耐腐蚀性,经72 h盐雾试验出现白锈面积仅为8％.
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