以丙烯酸树脂作主成膜剂，钼酸、磷酸盐作缓蚀剂，再加入经铝溶胶改性的硅烷偶联剂，通过交联反应在镀锌板表面形成无铬钝化膜。利用红外光谱、中性盐雾试验、电化学交流阻抗和极化曲线对镀锌板表面钝化膜特征进行了表征。结果表明：铝溶胶改性硅烷在钝化膜中形成了Si-O-Al键；改性后的无铬钝化膜更加致密，耐腐蚀性能更高。
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