4.7 Article

Design of dual-scale composite structured superhydrophobic surfaces for atmospheric corrosion prevention based on coalescence-induced droplet jumping

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ELSEVIER
DOI: 10.1016/j.jtice.2022.104308

关键词

Superhydrophobic surface; Atmospheric corrosion prevention; Coalescence-induced droplet jumping behavior; Composite structures

资金

  1. National Natural Science Foundation of China [41922040]
  2. Strategic Priority Research Program of Chinese Academy of Sciences [XDA23050104]
  3. Key Deployment Project of Center for Ocean Mega-Research of Science, Chinese Academy of Sciences [COMS2019Q13]

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In this study, the influence of composite structured superhydrophobic surfaces on droplet self-jumping behavior was investigated. The results showed that the nano-scale composite structured SHS exhibited better droplet self-jumping performance and corrosion protection performance.
Background: The coalescence-induced droplet self-jumping behavior on superhydrophobic surfaces (SHS) provides a new idea for atmospheric corrosion prevention. Although the influence on droplet self-jumping on different scales in single structure has been well understood, the mechanism of composite structures on droplet self-jumping, especially the process of atmospheric corrosion prevention is still unclear. Methods: In this work, SHS that composite structured on micron-scale and nano-scale were designed on copper substrate at given salt solution concentration using hydrothermal method; and the difference of their droplet self-jumping behavior on surface was explored in energy perspective. ;Significant findings: Results showed that the nano-scale composite structured SHS was more conducive to droplet self-jumping for having smaller top layer structures and interfacial adhesion (E-int). Furthermore, the nano-scale composite structured SHS exhibited superior corrosion protection performance due to the wetting transition by droplet self-jumping. This study provides theoretical guidance for the development of corrosion prevention with composite structured SHS based on coalescence-induced droplet self-jumping behavior. (c) 2022 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

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