Zhang Binbin, Zhao Lixia, Hou Baorong
Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Polymers (Basel). 2024 Oct 3;16(19):2800. doi: 10.3390/polym16192800.
Mitigating the adverse effects of corrosion failure and low-temperature icing on aluminum (Al) alloy materials poses significant research challenges. The facile fabrication of bioinspired superhydrophobic materials offers a promising solution to the issues of corrosion and icing. In this study, we utilized laboratory-collected candle soot (CS), hydrophobic fumed SiO, and epoxy resin (EP) to create a HF-SiO@CS@EP superhydrophobic coating on Al alloy surfaces using a spray-coating technique. Various characterization techniques, including contact angle meter, high-speed camera, FE-SEM, EDS, FTIR, and XPS, were employed to investigate surface wettability, morphologies, and chemical compositions. Moreover, a 3.5 wt.% NaCl solution was used as a corrosive medium to evaluate the corrosion resistance of the uncoated and coated samples. The results show that the capacitive arc radius, charge transfer resistance, and low-frequency modulus of the coated Al alloy significantly increased, while the corrosion potential () shifted positively and the corrosion current () decreased by two orders of magnitude, indicating improved corrosion resistance. Additionally, an investigation of ice formation on the coated Al alloy at -10 °C revealed that the freezing time was 4.75 times longer and the ice adhesion strength was one-fifth of the uncoated Al alloy substrate, demonstrating superior delayed icing and reduced ice adhesion strength performance.
减轻腐蚀失效和低温结冰对铝合金材料的不利影响带来了重大的研究挑战。简便制备受生物启发的超疏水材料为腐蚀和结冰问题提供了一个有前景的解决方案。在本研究中，我们利用实验室收集的蜡烛烟灰（CS）、疏水性气相二氧化硅和环氧树脂（EP），采用喷涂技术在铝合金表面制备了HF-SiO@CS@EP超疏水涂层。使用了各种表征技术，包括接触角测量仪、高速摄像机、场发射扫描电子显微镜（FE-SEM）、能谱仪（EDS）、傅里叶变换红外光谱仪（FTIR）和X射线光电子能谱仪（XPS）来研究表面润湿性、形态和化学成分。此外，使用3.5 wt.%的NaCl溶液作为腐蚀介质来评估未涂层和涂层样品的耐腐蚀性。结果表明，涂层铝合金的电容弧半径、电荷转移电阻和低频模量显著增加，而腐蚀电位（）正向移动，腐蚀电流（）降低了两个数量级，表明耐腐蚀性得到改善。此外，对涂层铝合金在-10°C下结冰情况的研究表明，结冰时间延长了4.75倍，冰附着力强度是未涂层铝合金基体的五分之一，显示出优异的延迟结冰和降低冰附着力强度性能。
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