通过对铜基表面进行电沉积得到微纳米粗糙化铜,再通过多巴胺键联低表面能物质(十二硫醇)最终得到超疏水膜层,该膜层接触角达150°以上,低频阻抗达106．1Ω.cm2,比裸铜增加2．4个数量级,阳极极化电流降低到1．02×10－8A/cm2,表现出较好的抗腐蚀能力.模拟海洋潮差区将其置于干湿交替环境下研究其抗腐蚀行为,同时与干及湿环境下相同周期对比,发现干湿交替环境下腐蚀最为严重.经过28个干湿交替周期后,该膜层整体破坏较小,低频区阻抗值略有降低,但仍具有较好的抗腐蚀性能.
In this study,the superhydrophobic film with a water contact angle above 150°was realized on copper substrate by electrodepositing micro- and nanostructured copper followed by modification of 1-dodecanethiol. The electrochemical impedance spectroscopy result with the impedance value of about 106.1 Ω.cm2 which in-creases by 2.4 order of magnitude than bare copper in the low frequency region,and the potentiodynamic polari-zation measurements with a anodic polarization current density of about 1.02×10-8 A/cm2 ,which indicate that the film shows excellent corrosion resistance performance.The superhydrophobic film treated under dry/wet al-ternative conditions to simulate marine tidal range zone environment has the lowest anticorrosion property com-pared with the anticorrosion behaviors in dry and wet conditions.The results of the elelctrochemical tests dem-onstrate that the film still presents good anti-corrosion ability after dry/wet alternative 28 cycles,with nearly integral morphology and slightly smaller impedance.
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