In recent years, with rising demands for quality of life and growing awareness of environmental protection and energy conservation, self-cleaning evaporator coatings—anti-corrosive, hydrophobic paints—have rapidly advanced. Self-cleaning surfaces are those where contaminants or dust can be automatically removed or broken down by external forces such as gravity, rain, or wind. These evaporator coatings have already been widely adopted across various sectors of modern life and industry.

　　Evaporator coating technology featuring anti-corrosion and hydrophobic properties is a fundamental technique with broad practical value, widely applied in everyday life. By designing coatings with diverse structural, chemical, and physical characteristics, it’s possible to impart entirely new functionalities to solid materials—particularly addressing the rapidly growing demand for hydrophobic coatings in modern industries, thereby revitalizing the development of functionalized hydrophobic coatings. Superhydrophobic coatings, in turn, represent a cutting-edge surface technology that has emerged as a direct evolution of this innovative approach.

　　The evaporator coating, a corrosion-resistant, hydrophobic paint, is a low-surface-energy coating applied to smooth surfaces, resulting in a static water contact angle greater than 90 degrees. Meanwhile, superhydrophobic coatings are innovative materials with unique surface properties—solid coatings that exhibit water contact angles exceeding 150 degrees—and typically show a hysteresis of less than 5 degrees. These coatings offer exceptional performance in waterproofing, anti-fogging, anti-fouling, and anti-adhesion applications.

　　What are the anti-corrosion, hydrophobic coating materials used for evaporator film applications?

　　Evaporator Coating: Anti-Corrosion, Hydrophobic Paint Made from Fluoro/Silicone Materials

　　The fluorine element has a strong electronegativity, an extremely small atomic radius, and a very low polarizability. In organic fluorine compounds, the C-F bond is relatively robust, with fluorine atoms arranged helically along the carbon chain, providing a shielding effect. This results in weak intermolecular forces and exceptionally low surface energy. Among fluorocarbon coatings, commonly used weather-resistant, insulating, and hydrophobic coatings such as PTFE, FEP, ECTFE, ETFE, and PFA are also employed to create superhydrophobic coatings—often combined with PTFE, fluorinated polyethylene, fluorocarbon waxes, or other synthetic fluoropolymer-based materials. However, plutonium resins and certain gas surfaces exhibit a weaker interfacial layer, leading to reduced adhesion strength when bonded to metals or other gases. As a result, additional techniques are often required to enhance their grip on substrates, which significantly limits their practical applications.

　　Evaporator coating, anti-corrosion hydrophobic paint, and other hydrophobic materials

　　Other synthetic high-molecular-weight melt polymers, such as polyolefins, polycarbonates, polyamides, polyesters, fluorine-free acrylates, and molten paraffin wax, can be combined with specific processing techniques to achieve superhydrophobic properties. Han et al. synthesized a ternary block copolymer—Pt-BA-b-PDMS-b-Pt-BA—via atom-transfer radical polymerization, which was then used to create a superhydrophobic coating.

　　Evaporator Coating: Anti-Corrosion, Hydrophobic Organic-Inorganic Hybrid Material

　　Organic-inorganic hybrid materials often exhibit nanostructures, which not only provide roughness with specific microarchitectures but also confer remarkable static hydrophobicity. Thanks to their unique optical properties, sol-gel composites made from alkoxysilanes can be directly applied to existing optical materials, colored glass, light protection, optical imaging, lasers, information recording, and other advanced components.