He Zihao, Zeng Yanwei, Zhou Miaomiao, Min Yulin, Shen Xixun, Xu Qunjie
Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems, Shanghai University of Electric Power, 2588 Changyang Road, Yangpu District, Shanghai 200090, China.
Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
Langmuir. 2021 Jan 12;37(1):524-541. doi: 10.1021/acs.langmuir.0c03222. Epub 2020 Dec 21.
In this article, a novel and facile method is used to construct superhydrophobic surfaces on aluminum alloys. A solution of aluminum chloride hexahydrate and -dodecyltrimethoxysilane (DTMS) in ethanol was used as the electrolyte solution. The hydrolysis of DTMS was accelerated during the electrodeposition process, and the hydrolysate was bonded to a pretreated aluminum surface. The prepared aluminum alloy sample exhibits both superhydrophobicity (the surface water contact angle reached 155°) and excellent corrosion resistance. The inhibition efficiency of this sample is as high as 99.9% in 3.5 wt % NaCl solution, which remains at 98% even after 30 days of immersion. Thus, our fabrication can be well applied to the field of marine corrosion protection. Therefore, the working mechanism was discussed by confocal Raman microspectroscopy (CRM). In addition, the investigation by CRM and electrochemical impedance spectroscopy (EIS) also indicates that superhydrophobic samples show good stability in NaCl solution. The fabrication method can inspire new ideas for the construction of superhydrophobic aluminum alloys in the marine environment.
在本文中，采用了一种新颖且简便的方法在铝合金表面构建超疏水表面。以六水合氯化铝和十二烷基三甲氧基硅烷（DTMS）的乙醇溶液作为电解液。在电沉积过程中，DTMS的水解加速，水解产物与预处理过的铝表面结合。制备的铝合金样品既具有超疏水性（表面水接触角达到155°）又具有优异的耐腐蚀性。该样品在3.5 wt%的NaCl溶液中的缓蚀效率高达99.9%，即使浸泡30天后仍保持在98%。因此，我们的制备方法可很好地应用于海洋腐蚀防护领域。因此，通过共焦拉曼光谱（CRM）对其作用机理进行了探讨。此外，CRM和电化学阻抗谱（EIS）的研究还表明，超疏水样品在NaCl溶液中表现出良好的稳定性。该制备方法可为在海洋环境中构建超疏水铝合金提供新思路。
