张传伟,李雪伍,石甜,张来昌.5A05铝合金表面超疏水结构的制备及耐腐蚀性研究[J].稀有金属材料与工程,2018,47(10):2980~2985.[Zhang Chuanwei,Li Xuewu,Shi Tian,Zhang Laichang.Superhydrophobic Micro-nano Structures on 5A05 Al Alloy Surface with Enhanced Corrosion Resistance[J].Rare Metal Materials and Engineering,2018,47(10):2980~2985.]
5A05铝合金表面超疏水结构的制备及耐腐蚀性研究
投稿时间:2018-03-26  修订日期:2018-07-25
中文关键词:  铝合金  微纳结构  超疏水  耐腐蚀
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)51705416
中文摘要:
      腐蚀失效是制约铝基金属构筑物应用与发展的瓶颈。作为一种稳定的功能性改良新技术,表面超疏水化为解决金属腐蚀问题提供了有效途径。本文以5A05铝合金为研究对象,提出一种简单低成本的制备方法,实现了超疏水/耐腐蚀表面的可控构筑。采用电火花线切割技术,开展基材表面微米级褶皱与纳米级凹坑结构的一步高效制备研究,并对结构改性后的润湿性和耐腐蚀性进行系统测量与表征。结果表明,改性后的表面水滴静态接触角高达152.7°,滚动角仅为7.1°,表现出优异的超疏水性。进一步的电化学测试结果表明,超疏水表面通过改变界面作用行为,减弱了固-气-液复合接触界面间腐蚀介质的作用行为与过程,对表面耐腐蚀性产生决定性影响。本研究为拓展铝合金的工程应用奠定了坚实基础,尤其在海洋工程领域显示出巨大的应用潜力。
Superhydrophobic Micro-nano Structures on 5A05 Al Alloy Surface with Enhanced Corrosion Resistance
英文关键词:Al alloy  micro-nano structures  superhydrophobicity  corrosion resistance
英文摘要:
      Corrosion failure is a bottleneck problem that restricts the application of Al alloys. As a stable technology for functional implementation, the superhydrophobic fabrication exactly provides an effective method to solve metallic corrosion. This work develops a simple and low-cost method to endow 5A05 Al alloy with superior superhydrophobicity and corrosion resistance. The microscale wrinkles covered with nanoscale craters are prepared by one-step wire electrical discharge machining process. Meanwhile, the wettability and corrosion resistance of as-prepared structures are investigated after the low-surface-energy modification. The results show that the modified surface exhibits excellent superhydrophobicity with a water contact angle (CA) of 152.7° and a sliding angle (SA) of 7.1°. Furthermore, its corrosion resistance is assessed by the electrochemical tests. Ultimately, owing to the trapped air in micro-nano structures, the solid-air-liquid interfaces help to resist seawater penetration on the superhydrophobic surface as well as significantly enhance its corrosion resistance. This work sheds insights into extending the applications of Al alloys in many areas especially for oceaneering fields.
作者单位E-mail
张传伟 西安科技大学机械工程学院 zhangcw@xust.edu.cn 
李雪伍 西安科技大学机械工程学院 lixuewu55@126.com 
石甜 西安科技大学机械工程学院 tianshi@xust.edu.cn 
张来昌 埃迪斯科文大学工程学院 l.zhang@ecu.edu.au 
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