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刘聪,李雪伍,雷永杰,章桥新,黄行九.5A02铝合金表面微纳结构的制备及防腐行为研究[J].稀有金属材料与工程(英文),2018,47(9):2875~2880.[liu cong,Li Xuewu,Lei Yongjie,Zhang Qiaoxin and Huang Xingjiu.Fabrication of Micro-Nano Structures on 5A02 Al alloy Subatrate and the Anti-Corrosion Property[J].Rare Metal Materials and Engineering,2018,47(9):2875~2880.]
Fabrication of Micro-Nano Structures on 5A02 Al alloy Subatrate and the Anti-Corrosion Property
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Received:November 18, 2016  Revised:January 20, 2017
DOI:
Key words: Al alloys  micro-nano structures  superhydrophobic  anti-corrosion
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
liu cong,Li Xuewu,Lei Yongjie,Zhang Qiaoxin and Huang Xingjiu  
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Abstract:
      This work has developed a low-cost method to render 5A02 Al alloy substrate superior anti-corrosion property with the acid etching, passivation treatment and fluoroalkyl-silane modification. The micro-nano structures were constructed with the micro-scale porous terraces and nano-scale flocculent layer by optimizing the hydrochloric acid etching and potassium permanganate passivation conditions. After the fluoroalkyl-silane modification of the fabricated aluminum surface, a superhydrophobic surface was attained with a water contact angle of 156.1°and a contact angle hysteresis of 1.5°. Meanwhile, the electrochemical tests showed that the fabricated micro- and nano-scale hierarchical structures could inhibit the anode and cathode reaction of the electrochemical corrosion and impede the contact between the substrate and the corrosion medium. As a result, the anti-corrosion property of the fabricated surface was finally improved, which can broaden the application fields of aluminum with important engineering significance.