阳极氧化法构筑的铝基超疏水表面及其耐蚀性能  

Superhydrophobic surface of aluminum alloy prepared by anodic oxidation and its corrosion resistance

作　　者：庄明塔 徐睿思 刘灿森 揭晓华[1] Zhuang Mingta;Xu Ruisi;Liu Cansen;Jie Xiaohua(Faculty of Material and Energy,Guangdong University of Technology,Guangzhou Guangdong 510006,China)

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《金属热处理》2021年第9期241-246,共6页Heat Treatment of Metals

基　　金：国家自然科学基金(51805089);大学生创新创业训练项目(202011845053)。

摘　　要：通过接触角测量仪、扫描电镜、红外光谱、电化学工作站对经阳极氧化及低表面能物质修饰相结合处理的7075铝合金的表面的形貌、化学成分和耐蚀性能进行了表征。结果表明:阳极氧化法构筑的珊瑚状微纳结构和低表面能十四酸的协同效应赋予了7075铝合金表面超疏水性能。当草酸浓度40 g/L、电流密度20 A/dm^(2)、阳极氧化时间10 min时,获得的铝合金超疏水表面接触角最大,为152°,耐蚀性能最好,腐蚀速率比铝合金基体降低了4个数量级,同时具有优异的防污和自清洁性能。Surface morphology,chemical composition and corrosion resistance of the anodized and low surface energy materials modified 7075 aluminum alloy were characterized by contact angle measurement instrument,scanning electron microscopy,infrared spectroscopy,and electrochemical workstation.The results show that the synergistic effect of coral like micro-nano structure constructed by anodic oxidation and low surface energy oxalic acid endows 7075 aluminum alloy with superhydrophobic property.When the concentration of oxalic acid is 40 g/L,the current density is 20 A/dm^(2),and the anodizing time is 10 min,superhydrophobic aluminum alloy surface shows the largest contact angle of 152°,and the outstanding corrosion resistance,which is 4 orders of magnitude lower than that of the aluminum alloy matrix,and the excellent antifouling as well as self-cleaning properties.

关 键 词：铝合金 阳极氧化 超疏水 耐腐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]