Hybrid superamphiphobic anti-corrosion coating with integrated functionalities of liquid repellency, self-cleaning, and anti-icing

Superhydrophobic materials have shown tremendous potential in various fields. However, the adhesion, wetting, and pinning of low-surface-tension liquids greatly limit their multifunctional applications. Therefore, the creation of superamphiphobic coatings that combine superhydrophobic and superoleophobic properties through a simple preparation strategy is desirable. In this study, we successfully developed an organic-inorganic hybrid superamphiphobic coating on Q235 carbon steel using aluminum oxide nanoparticles, organosilanes, and waterborne epoxy resin via a versatile spray-coating technique. The coating exhibited high contact angles ( > 151(degrees)) and low sliding angles ( < 7(degrees)) for water and oil liquids, demonstrating excellent superamphiphobic characteristics. Electrochemical tests demonstrated significant improvements in charge transfer resistance and low-frequency modulus for the superamphiphobic coating. The corrosion potential shifted positively by 590 mV, and the corrosion current density decreased by four orders of magnitude. Additionally, the coating endured 480 h of salt spray and 2400 h of outdoor atmospheric exposure, showcasing superior anti-corrosion capacity. Freezing tests of water droplets at -10 degree celsius and - 15 degree celsius confirmed that the coating significantly prolonged the freezing time with reduced ice adhesion strength. We believe that the designed superamphiphobic coating with integrated functionalities of selfcleaning, anti-corrosion, anti-icing, and anti-liquid-adhesion can provide important solutions for extending the lifespan of materials in marine and industrial environments.(c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.