Fabrication of self-cleaning superhydrophobic surface on aluminum alloys with excellent corrosion resistance
Fabrication of self-cleaning superhydrophobic surface on aluminum alloys with excellent corrosion resistance
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DOI：
10.1016/j.surfcoat.2015.07.002
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发表时间：
2015-08
影响因子：
5.4
通讯作者：
S. Zheng;S. Zheng;Cheng Li;Q. Fu;Min Li;Wei Hu;Qi Wang;Mengping Du;Xingchen Liu;
中科院分区：
文献类型：
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作者：
S. Zheng;S. Zheng;Cheng Li;Q. Fu;Min Li;Wei Hu;Qi Wang;Mengping Du;Xingchen Liu;
铝合金广泛应用于各个领域，但腐蚀和污染会严重影响其功能和美观。自清洁超疏水表面（SCSS）可能是一个潜在的解决方案的问题。在这项研究中，SCSS的制备通过一个简单的和低成本的方法，电化学阳极氧化，然后用肉豆蔻酸表面改性。利用原子力显微镜（AFM）和场发射扫描电子显微镜（FESEM）结合能谱仪（EDS）对表面形貌和成分进行了表征。在SCSS上的静态水接触角（CA）和滑动角（SA）分别为155.6 ± 1.0°和5.7 ± 0.2°。电化学测量结果表明，SCSS的腐蚀电流密度（Jcorr）显著降低了3个数量级，腐蚀电位（Ecorr）从− 0.838 V移至0.403 V，显示出优异的耐腐蚀性。在室温下室内暴露9个月后，进一步证明SCSS功能良好。在去离子水和无水乙醇等常用溶剂中浸泡36 h后，其化学稳定性良好。此外，所制备的SCSS还表现出良好的自清洁性能。
Aluminum (Al) alloys have been widely used in various fields while corrosion and contamination can cause serious problems to their functionality and aesthetic appearance. A self-cleaning superhydrophobic surface (SCSS) could be a potential solution to the problems. In this study, SCSS was fabricated via a facile and low-cost method with electrochemical anodization followed by surface modification using myristic acid. The surface morphology and composition were characterized by an atomic force microscope (AFM) and a field emission scanning electron microscope (FESEM) with attached energy dispersive X-ray spectrum (EDS). The static water contact angle (CA) and sliding angle (SA) on the SCSS were 155.6 ± 1.0° and 5.7 ± 0.2°, respectively. Electrochemical measurement results showed that the corrosion current density (Jcorr) of SCSS was significantly reduced by 3 orders of magnitude and the corrosion potential (Ecorr) shifted from − 0.838 V to 0.403 V, indicating excellent corrosion resistance. The SCSS was further proven to function well after 9 month indoor exposure at room temperature. It also had good chemical stability after immersion in common solvents including deionized (DI) water and absolute ethanol for 36 h. In addition, the as-prepared SCSS also showed good self-cleaning performance.