摘要
对铝基进行恒电流阳极氧化后,采用正辛基三乙氧基硅烷化学改性,制得超疏水膜。采用接触角测试仪、扫描电镜、红外光谱仪、电化学工作站等,研究了所得超疏水膜的静态接触角、表面形貌、结构及耐蚀性。结果表明,经阳极氧化后,铝基构建了粗糙的微纳米结构,再硅烷化处理后,铝基表面的疏水性增强,静态接触角大于150°。超疏水膜使铝在质量分数为3.5%的NaCl溶液中的自腐蚀电位正移0.11V,腐蚀电流密度降低4个数量级,有效地提高了铝的耐蚀性。
A superhydrophobic film was prepared on aluminum substrate by anodic oxidation under constant current followed by chemical modification using n-octyltriethoxysilane. The static contact angle, surface morphology, structure, and corrosion resistance of the superhydrophobic film were studied using contact angle meter, scanning electron microscope, infrared spectroscope, and electrochemical workstation, respectively. The results showed that micro/nanostructures are formed on aluminum substrate by anodic oxidation. The hydrophobicity of the aluminum surface is enhanced through anodic oxidation followed by silanization, with a static contact angle being above 150°. The free corrosion potential of the superhydrophobic film is shifted positively by 0.11 V in 3.5wt% NaCl solution, and the corrosion current density is decreased by 4 orders of magnitude, thus improving the corrosion resistance of aluminum effectively.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2012年第5期34-36,共3页
Electroplating & Finishing
基金
中央高校基本科研业务费专项资金(1000-852012)
关键词
铝
阳极氧化
硅烷
超疏水性
耐蚀性
aluminum
anodic oxidation
silane
super- hydrophobicity
corrosion resistance
