苯并三氮唑对铝表面Al2O3/氧化铈复合膜耐蚀性的影响

Effect of Benzotriazole on corrosion resistance of Al2O3/cerium oxide composite films on the Al surface

摘要:

采用阳极氧化法和化学浸泡法相结合的方式制备了Al2O3/铈氧化物复合膜。首先在49g/L 的硫酸溶液中对铝合金进行阳极氧化，然后将阳极氧化后的铝合金在50℃下浸渍在含有2g/L Ce(NO3)3?6H2O, 20mL/L H2O2溶液中30min，进行铈氧化膜的转化。探究了溶液中不同苯骈三氮唑（BTA）浓度(0 g/L, 0.25 g/L, 0.5 g/L, 1 g/L, 1.5 g/L)对所制备的Al2O3/铈氧化物复合膜抗腐蚀性能的影响。 采用了X射线衍射仪(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)、电化学工作站等技术手段对复合膜的性能进行了表征。测试结果表明，当BTA的加入浓度为0.5g/L时，铈离子沉积效果最佳，所制备复合膜表面的平整性和光滑性得到了良好的改善，此时的复合膜抗腐蚀性能明显提高。

Abstract:

This study combined anodic oxidation with chemical impregnation method to prepare Al2O3/cerium oxide composite films. First, the aluminum was anodized in 49 g/L sulfuric acid, then the anodized aluminum alloys were impregnated in the solution which contained 2g/L Ce(NO3)3?6H2O, 20mL/L H2O2 at 50℃ for 30min. And the effect of different concentrations (0 g/L, 0.25 g/L, 0.5 g/L, 1 g/L, 1.5 g/L) of 1H-Benzotriazole (BTA) on corrosion resistance of Al2O3/cerium oxide composite films was researched. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), electrochemical workstation was used to characterize the properties of the composite films. The results showed that when the concentration of BTA was 0.5g/L, the deposition effect of cerium ions was best. At the same time the surface uniformity and smoothness of composite films were both enhanced. And the resistance corrosion of composite films was increased mostly.