金属锌表面超疏水薄膜的耐蚀及摩擦学性能的表征

目的改善金属锌在海洋环境中的耐蚀及摩擦学性能。方法通过简单的化学刻蚀及自组装技术在金属锌表面制备超疏水薄膜,对薄膜的结构和润湿性进行了表征,研究了超疏水薄膜在模拟海水(3.5%Na Cl溶液)中的耐蚀性能和摩擦学性能。结果经N,N-二甲基甲酰胺水溶液刻蚀后,金属锌表面呈多尺度微纳的Zn O结构,Zn O结构经硬脂酸修饰后,表面呈现出超疏水特性,表面静态接触角达150°,滑动角小于5°。同时发现,在3.5%Na Cl水溶液中,金属锌表面超疏水薄膜具有优异的耐蚀性能,并能够显著降低摩擦和磨损。结论经简单的化学刻蚀及自组装技术可在锌表面构筑超疏水薄膜,薄膜在海洋环境下具有良好的耐蚀、减摩及耐磨性能。

Characterization of Corrosion Resistance and Tribological Property of Super-hydrophobic Film on Metallic Zinc

The work aims to improve corrosion resistance and tribological property of metallic zinc in marine environment. Super-hydrophobic film was prepared on metallic zinc by adopting chemical etching and self-assembly technique. Film structure and wettability of the film were characterized. Moreover, corrosion resistance and tribological property of the super-hydrophobic film on metallic zinc were studied in simulated sea water (3.5% NaCl solution). Multiscale micro-nano ZnO structure was detected on the surface of metallic zinc after being etched by aqueous solution containing N,N-dimethylformamide. The as-fabricated surface modified by a layer of stearic acid exhibited super-hydrophobicity, its water contact angle was 150° and rolling angle below 5°. Meanwhile, the super-hydrophobic film on metallic zinc in 3.5% NaCl aqueous solution exhibited excellent corrosion resistance, and could significantly reduce friction and wear. The superhydrophobic film prepared on zinc by adopting simple chemical etching and self-assembly technology exhibit excellent corrosion resistance ad tribological property in marine environment.