Preparation of Self-Curing Epoxy-Based Superhydrophobic Coating: Exhibiting Self-Cleaning, Anti-Corrosion and Delayed Icing Performance

Superhydrophobic materials exhibit excellent liquid-repelling properties, offering extensive application possibilities in self-cleaning, corrosion prevention and ice inhibition. This research indicates that hydrophobic modified SiO 2 nanoparticles, perfluorooctyltriethoxysilane (PTOS) and epoxy resin E51 were used as main raw materials to fabricate F@SiO 2 superhydrophobic coatings via spray-coating technology, applied to Q235B carbon steel. Results show the coating exhibited a significant water contact angle ([Formula: see text]150[Formula: see text]) and minimal sliding angle ([Formula: see text]8[Formula: see text]), demonstrating outstanding superhydrophobic characteristics. In self-cleaning tests, water droplets easily rolled off, removing solid contaminants, showcasing significant self-cleaning effects. Electrochemical results indicated the coating greatly enhanced anti-corrosion performance: charge transfer resistance increased, potential for corrosion moved toward a more positive value and the density of corrosive currents diminished. Neutral salt spray test revealed long-lasting protection, with the coating maintaining an intact anti-corrosion state. Moreover, the neutral salt spray test (144[Formula: see text]h) demonstrated no corrosion traces on the coating, confirming long-term protection. At [Formula: see text]C and [Formula: see text]C, the freezing time of water droplets on the coating extended to 80[Formula: see text]s and 100[Formula: see text]s, respectively, indicating notable anti-icing properties. In summary, the self-curing superhydrophobic coating developed combines self-cleaning, anti-corrosion, ice delay and high mechanical stability, providing an efficient solution for protecting metal materials in complex environments.