采用有机硅烷协同氟锆酸盐复合制备出硅烷处理液,在冷轧钢板表面形成复合转化膜.通过硫酸铜点滴试验确定了较佳的配方组成为H2ZrF6 0.5 g/L、γ-APS 5 g/L、ZnSO4·7H2O0.5 g/L、GPS 10g/L、OP- 100.1 g/L,浸泡时间5 min.测试了所制硅烷转化膜的附着力和耐中性盐雾性能,并与德国某公司的硅烷处理液进行了对比.结果表明,该转化膜与环氧漆和聚氨酯漆有良好的结合力(附着力达到0级),涂层体系可通过504 h中性盐雾试验,表现出与对比产品相当的性能,具有良好的市场应用前景.
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