氯化铈掺杂对6061铝合金表面硅烷膜性能的影响

Effect of Cerium Chloride on Corrosion Performance of Silane Film on AA6061

采用极化曲线、硫酸铜点滴、盐水浸泡等方法,研究了稀土氯化物对铝合金表面γ-(甲基丙烯酰氧)丙基三甲氧基(KH-570)硅烷膜耐蚀性能的影响。结果表明,在KH-570硅烷膜制备过程中添加一定量CeCl3可有效提高硅烷膜的耐蚀性;扫描电子显微镜(SEM)显示:未含CeCl3的硅烷膜表面有轻微裂痕,而含量为0.2%CeCl3的改性硅烷膜表面较为均匀致密。在本试验工艺条件下,硅烷溶液中CeCl3的最佳含量为0.2%。

The effect of rare earth chlorides on corrosion resistance of of the methacryloxy propyl trimethoxyl silane film on AA 6061 surface was studied by means of polarization curves,CuSO4 dropping and salt-water immersion test.The results showed that doping a certain content of CeCl3 in the preparation of the methacryloxy propyl trimethoxyl silane film could improve the corrosion resistance of silane film effectively.Scanning electron microscopy （SEM） indicated that the methacryloxy propyl trimethoxyl silane film had some cracks on its surface,and the modified silane film with a content of CeCl3 was dense and uniform.Under the technical conditions determined by this experiment,the optimum content of CeCl3 in the silane solution was 0.2％.