阳极氧化法制备铝基超疏水涂层及其稳定性和耐蚀性的研究

发布时间：2018-05-24 21:16

本文选题：超疏水涂层 + 铝　；参考：《材料工程》2017年10期

【摘要】：铝由于在潮湿的环境中很容易受到污染和损坏,从而严重影响了其美观性和用途。为了改善铝基材料的耐腐蚀性能,采用电化学阳极氧化法与十四酸修饰相结合的方式在铝基底上制备了超疏水涂层。通过场发射扫描电镜(FESEM)和X射线能量色散光谱(EDS)对涂层表面形貌和化学组成进行了表征。同时利用接触角测量仪、喷砂实验和电化学测试分别对涂层表面的润湿性、机械稳定性以及耐腐蚀性能进行了研究。结果表明:当阳极氧化电压为20V时,所制备的涂层为最佳铝基超疏水涂层,此时涂层的接触角为(155.2±0.5)°,滚动角为(3.5±1.3)°。其对应的腐蚀电流密度较铝基底降低了2个数量级,腐蚀电位从-0.629V正移到-0.570V,呈现出优异的耐腐蚀性能。此外,该涂层还具有良好的机械稳定性。
[Abstract]:Aluminum is easy to be polluted and damaged in wet environment, which seriously affects its beauty and use. In order to improve the corrosion resistance of aluminum based materials, superhydrophobic coatings were prepared on aluminum substrates by electrochemical anodic oxidation and tetradecanoic acid modification. The surface morphology and chemical composition of the coating were characterized by field emission scanning electron microscopy (FESEM) and X-ray energy dispersive spectroscopy (EDS). At the same time, the wettability, mechanical stability and corrosion resistance of the coating surface were studied by contact angle measuring instrument, sand blasting test and electrochemical test. The results show that when the anodizing voltage is 20 V, the optimum Al based superhydrophobic coating is prepared, the contact angle of the coating is 155.2 卤0.5 掳and the rolling angle is 3.5 卤1.3 掳. The corresponding corrosion current density is two orders of magnitude lower than that of the aluminum substrate, and the corrosion potential moves from -0.629 V to -0.570 V, showing excellent corrosion resistance. In addition, the coating also has good mechanical stability.
【作者单位】：南京航空航天大学材料科学与技术学院;
【基金】：江苏高校优势学科建设工程资助项目(PAPD-062) 南航-中联科技电子新材料联合实验室基金资助项目(201503)
【分类号】：TG174.4

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