Achieving hierarchical structure with superhydrophobicity and enhanced anti-corrosion via electrochemical etching and chemical vapor deposition

作者：Ye, Yuze; Kang, Zhixin; Wang, Fen; Long, Yan^*; Guo, Tao^*; Chen, Dexin; Kong, Jing; Xu, Lin

来源：Applied Surface Science, 2023, 610: 155362.

DOI：10.1016/j.apsusc.2022.155362

• Superhydrophobic surface
• Hierarchical structure
• Mechanochemical stability
• Corrosion resistance
• Self-cleaning

In this work, superhydrophobic surfaces with hierarchical and multi-scale micro/nanostructures were fabricated by a simple method without damaging the substrate material. Electrochemical etching and chemical vapor deposition were taken to adhere the robust electroplated Ni with the excellent hydrophobic material of poly-dimethylsiloxane (PDMS) to provide a double-layer protection for the bare Cu substrate. The as-prepared superhydrophobic surface exhibited a high contact angle (CA) of 158.5 +/- 0.4 degrees and a low slide angle (SA) of 2.1 +/- 0.2 degrees. Electrochemical corrosion test results showed the corrosion current density of superhydrophobic surface was about 4 orders of magnitude lower than that of bare Cu in 3.5 wt% NaCl solution, indicating that the superhydrophobic surface had superior corrosion resistance. We also discussed the corrosion resistance mech-anism of superhydrophobic surface with hierarchical and multi-scale micro/nanostructure. In addition, the as -prepared superhydrophobic surface also demonstrated good mechanochemical and self-cleaning properties, which may greatly facilitate the application in practical conditions.

• 单位
  中国科学院; y