A simple, inexpensive and environmental-friendly electrochemical etching method to fabricate superhydrophobic GH4169 surfaces

SURFACE & COATINGS TECHNOLOGY

卷:399

Article

Ma, Ning¹  Cheng, Dan¹  Zhang, Jingqiang¹  Zhao, Shuguo¹  Lu, Yao² 

[1] Shenyang Aerosp Univ, Sch Mechatron Engn, Shenyang 110136, Peoples R China

[2] Queen Mary Univ London, Sch Biol & Chem Sci, Dept Chem, London E1 4NS, England

关键词: GH4169;    Superhydrophobic surfaces;    Electrochemical etching;    Anti-icing;   

DOI  :  10.1016/j.surfcoat.2020.126180

来源: Elsevier

【 摘 要 】

GH4169 is a nickel-based superalloy that has been widely used in aerospace, nuclear energy, petroleum industry and extrusion molds due to its excellent strength, weldability and long-term stability. To improve its self-cleaning and anti-icing properties in consideration of its broad applications in aerospace and aviation, we developed an electrochemical method using neutral electrolyte, followed by low surface energy treatment to fabricate superhydrophobic GH4169 surfaces. The superhydrophobic surfaces prepared in sodium nitrate and sodium chloride solutions had contact angles of 159.6 degrees and 160.7 degrees, and sliding angles of 7.65 degrees and 7.8 degrees, respectively. Their surface wettability is highly dependent on current density and process time in electrochemical etching whereas the concentration and temperature of the electrolyte are not so important. The prepared superhydrophobic GH4169 surfaces demonstrate anti-adhesion, self-cleaning and anti-icing properties.

【 授权许可】

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