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采用阳极氧化工艺,并结合封孔处理和低表面能修饰,在建筑行业常用的6463铝合金表面制备出耐久性超疏水阳极氧化膜。表征了试样形貌、成分和表面接触角,并通过模拟实验测试了耐蚀性和耐久性。结果表明:经过阳极氧化、封孔处理和表面修饰后在铝合金试样表面形成微纳米分级结构的阳极氧化膜,主要含有Al、O、S、C和Ti元素,表面接触角达到153.2°,呈现超疏水状态。超疏水阳极氧化膜具有良好的结合力,在自然环境中能保持稳定的超疏水状态,耐久性良好,还具有良好的耐蚀性,可以有效抑制铝合金基体腐蚀。 相似文献
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近年来,在研究领域接触角大于150°的超疏水表面有着巨大的吸引力.超疏水表面一般通过构造一定表面粗糙度和用低表面自由能物质修饰表明而成.文章简单的介绍了疏水表面的基础理论和最新研究进展.虽然超疏水表面在实际应用中还有一定的限制,但这些困难都将慢慢被克服,最后超疏水表面将应用在各种不同的工业领域. 相似文献
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概述了超疏水表面的浸润原理,着重介绍了基于聚二甲基硅氧烷(PDMS)的耐久性超疏水表面的开发制备工艺,以及其在不同领域内的应用进展.最后,对超疏水表面进行了总结与展望. 相似文献
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润湿性能是固体表面的重要特征之一,具有特殊润湿性和可控润湿性材料因其巨大的应用潜力而成为人们关注的热点。介绍超疏水状态下Wenzel和Cassie-Baxter两种接触角模型及其相互关系,讨论了微纳米结构对疏水表面接触角的影响,总结了近年来超疏水表面制备技术的研究进展,并展望了超疏水表面润湿理论研究前景。 相似文献
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Preparation and characterization of durable superhydrophobic protective coatings on aluminum alloy
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The durable superhydrophobic protective coatings on the 7B04 aluminum alloy surface was prepared by using acid etching and boiling water bath to construct micro-nano hierarchical structure, and then spraying suspension containing aluminum phosphate adhesive (AP) and perfluorooctyltrichlorosilane (PFOTS) to increase adhesion and reduce surface energy. The samples were characterized by field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), contact angle measurement (CA), electrochemical impedance spectroscopy(EIS) and a variety of the environmental simulation experiments. The results showed that the static water contact angle (WCA) of the surface is 158.4° and the slide angle (SA) is about 0°, suggesting superhydrophobicity and low adhesion to water. The coating resistance (Rc) was as high as 101.55 kΩ· cm2 and the charge transfer resistance (Rt) in NaCl corrosion medium increased by nearly two orders of magnitude, showing excellent protective performance. The sample can withstand a variety of damages, with ideal mechanical durability, chemical durability and environmental durability. 相似文献
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几种机械表面处理方法对6013铝合金接头胶接性能的影响 总被引:1,自引:0,他引:1
采用砂纸打磨、湿喷砂、纳米化等3种机械处理方法对6013铝合金表面进行处理,测试其粘接剪切强度,并与P2化学表面处理方法的结果进行对比。利用SEM、AFM、接触角测量仪等技术对铝合金表面处理前后的表面微观结构、微观粗糙度、润湿性等特性进行了研究。结果表明,不同的表面处理方法对铝合金接头的胶接性能影响不同。湿喷砂和砂纸打磨方法处理后铝合金接头的胶接性能与P2化学法表处的效果接近。纳米化方法不利于铝合金胶接性能的提高。微观粗糙度对铝合金的粘接性能具有重要影响,粗糙度越大,铝板胶接性能越好。润湿性不是影响胶接性能的关键因素。 相似文献
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Wanying Liu Xiaopeng Li Yuxing Xie Zhi Zhang Hong Yang Zhiqiang Huang Jiangling Ye 《International Journal of Applied Ceramic Technology》2022,19(5):2583-2597
Incorporated graphene coating was successfully prepared on D16T aluminum alloy by plasma electrolytic oxidation (PEO) technology, and the effect of graphene on the microstructure, corrosion resistance, and wettability of the coating was investigated. Microstructure, composition, and morphology were studied by transmission electron microscope, confirming that graphene was successfully incorporated into the coating with pancake-like and embedded mode. The thickness and microhardness of the coating with graphene (G2) increased, whereas roughness and porosity reduced due to the incorporation of graphene, compared to the coating without graphene (G0). The resistive arc radius of G2 is obviously increased. The real impedance value of G2 is four times than that of G0. The resistance (R1) of G0 and G2 are 3708 and 7533 Ω cm2, respectively. The resistance (R2) of G0 and G2 are 2.508E5 and 7.752E5 Ω cm2, respectively. The contact angle of G2 under three liquid droplets was maximum, showing minimal surface-free energy (36.8 mJ/m2). Formation water showed the most obvious effect on the wettability of the coating compared to the distilled water and sodium chloride solution. Results verified that graphene in PEO coating significantly improved the microstructure of the coating and enhanced the hydrophobic performance and corrosion resistance of the coating. 相似文献