论文部分内容阅读
分别用聚二甲基硅氧烷(PDMS)和甲基丙烯酸甲酯(MMA)作为添加剂,将1060铝浸于稀土铈盐的溶液中,在其表面形成化学转化膜,通过扫描电镜、极化与阻抗测试等分析转化膜的形貌,并研究其耐腐蚀性能。结果表明,加入添加剂后转化膜形貌更加均匀、致密,耐腐蚀性能明显提高。PDMS有消泡作用,促进铈离子沉淀,提高膜层的平整性。MMA可发生聚合,参与转化膜的形成,改善膜层的致密性。分别在PDMS为1.48 g.L-1和MMA为0.96 g.L-1时得到最佳效果,浓度过低或过高都会抑制转化膜的转化。
Respectively polydimethylsiloxane (PDMS) and methyl methacrylate (MMA) as additives, the 1060 aluminum immersed in a solution of cerium salt of rare earth, the formation of chemical conversion coating on its surface, by scanning electron microscopy, polarization And impedance test analysis of transformation film morphology, and study its corrosion resistance. The results show that the morphology of the conversion coating is more uniform and dense with the addition of additives, and the corrosion resistance is obviously improved. PDMS defoaming effect, promote precipitation of cerium ions, improve the formation of the membrane. MMA can occur polymerization, involved in the formation of conversion film to improve the membrane densification. The best results were obtained when PDMS was 1.48 g · L-1 and MMA was 0.96 g · L-1, respectively. Too low or too high concentration could inhibit the conversion of conversion coating.