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超浸润涂层在材料保护中的应用专栏

无氟铜基超疏水表面的制备及其耐腐蚀性能研究

  • 李雪伍 ,
  • 段世龙 ,
  • 石甜 ,
  • 梁靖松 ,
  • 施卫
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  • 1.西安科技大学机械工程学院,陕西西安 710054;
    2.江苏沙源检测校准技术有限公司,江苏苏州 215600
李雪伍(1988-),教授,博导,主要从事机械表界面行为研究,电话:13886071604,E-mail:lixuewu55@126.com

收稿日期: 2022-12-26

  修回日期: 2023-01-15

  录用日期: 2023-02-16

  网络出版日期: 2023-07-14

基金资助

国家自然科学基金(52275211);陕西省创新能力支撑计划(2021KJXX-38);中国博士后科学基金面上项目(2021M693883)资助

Study on Preparation and Corrosion Resistance of Fluorine Free Copper Based Superhydrophobic Surface

  • LI Xue-wu ,
  • DUAN Shi-long ,
  • SHI Tian ,
  • LIANG Jing-song ,
  • SHI Wei
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  • 1. School of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China;
    2. Jiangsu Shayuan Testing and Calibration Technology Co., Ltd., Suzhou 215600, China

Received date: 2022-12-26

  Revised date: 2023-01-15

  Accepted date: 2023-02-16

  Online published: 2023-07-14

摘要

腐蚀失效是制约铜基金属材料应用和发展的瓶颈。超疏水表面作为一种耐腐蚀性功能改良新技术,为解决铜金属腐蚀问题提供了有效途径。通过电火花线切割加工-硬脂酸表面修饰制备了超疏水铜表面,采用扫描电镜观察了其表面微观形貌,借助视频光学接触角仪测量其润湿性能,进一步通过电化学工作站对其腐蚀行为进行测试。结果表明:铜表面微米条形-纳米钟乳岩状分级复合结构被成功制备,并且该复合结构表面表现出优异的超疏水特性。此外,与基材相比,所制备的表面的耐腐蚀性提升了99.35%,并对该超疏水表面的防腐机理进行了系统研究分析,发现微纳复合结构的形成可有效捕获空气在试样表面形成固-气-液界面,其空气层的存在进一步阻碍了基底与电解质之间的电子传递和物质转移速度,从而抑制了基体电化学腐蚀速率,使得超疏水铜试样耐腐蚀性能显著提高。该方法简单高效用途广泛,制备过程环境友好,可适用大规模生产。

本文引用格式

李雪伍 , 段世龙 , 石甜 , 梁靖松 , 施卫 . 无氟铜基超疏水表面的制备及其耐腐蚀性能研究[J]. 材料保护, 2023 , 56(6) : 22 -26 . DOI: 10.16577/j.issn.1001-1560.2023.0130

Abstract

Corrosion failure is the bottleneck for restricting the application and development of copper-based metal materials. As a new technology of improving corrosion resistance, superhydrophobic surface provides an effective way to solve the problem of copper corrosion. In this work, the superhydrophobic copper surface was prepared by wire electrical discharge machining (WEDM) and surface modification with stearic acid. Subsequently, scanning electron microscope was used to observe the surface micro morphology, video optical contact angle meter was used to measure the wettability, and the corrosion behavior was further tested through the electrochemical workstation. Results showed that the micron strip nano stalactite graded composite structure on the copper surface had been successfully prepared, and the surface of the composite structure exihibited excellent superhydrophobic properties. In addition, compared with the substrate, the corrosion resistance of the prepared surface was increased by 99.35%. The corrosion prevention mechanism of the superhydrophobic surface was systematically studied and analyzed, and it was found that the formation of micro nano composite structure could effectively capture air to form a solid gas liquid interface on the surface of the sample, and the existence of the air layer further impeded the electron transfer and material transfer rate between the substrate and the electrolyte. Thereby, the electrochemical corrosion rate of the substrate was inhibited, and the corrosion resistance of the superhydrophobic copper sample was significantly improved. Overall, the method was simple, efficient and widely used, and the preparation process was environmentally friendly, which could be applied to large-scale production.

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