郑顺丽，李 澄，项腾飞，胡 玮，丁诗炳，王 晶，刘盼金

(南京航空航天大学 材料科学与技术学院，南京210016)

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

郑顺丽，李 澄，项腾飞，胡 玮，丁诗炳，王 晶，刘盼金

(南京航空航天大学 材料科学与技术学院，南京210016)

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。

超疏水涂层；铝；阳极氧化；耐蚀性；稳定性

Abstract： Aluminum (Al) can be easily contaminated or damaged after exposure in damp environments, which can adversely affect its aesthetic appearance and desired functionalities. To improve its corrosion resistance, a superhydrophobic coating was fabricated on Al by electrochemical anodization followed by modification with myristic acid. The surface morphology and chemical composition were characterized by using a field emission scanning electron microscope (FESEM) with attached energy dispersive X-ray spectrum (EDS). The surface wettability, mechanical stability as well as corrosion resistance were also investigated by contact angle measuring system, sandblasting test and electrochemical measurements. The results show that the optimal Al-based superhydrophobic coating with a static water contact angle of (155.2±0.5)° and a sliding angle of (3.5±1.3)° is obtained at the anodization voltage of 20V. The corresponding corrosion current density (Icorr) is reduced by 2 orders of magnitude and the corrosion potential (Ecorr) shifts from -0.629V to -0.570V compared to the bare Al substrate, indicating excellent corrosion resistance. Besides, the as-prepared optimal Al-based superhydrophobic coating also suggests good mechanical stability.

Keywords：superhydrophobic coating；aluminum；anodization；corrosion resistance；stability

铝在自然界中储量丰富，且因具有独特的延展性、高比强度以及良好的导电性等优异性能，被广泛应用在各个领域，尤其是在航空制造、交通运输和建筑行业[1]。但是，铝表面相对活性较高，其在使用过程中会因长时间暴露于潮湿的大气或者腐蚀介质中受到侵蚀而失效，所以在实际应用中必须对其表面进行处理。……