Research on the Anti-Icing Characteristics of a Protective Coating Surface in Low-Temperature Environment

In order to improve the polar adaptability of the submarine, a protective coating was applied to a large surface injection-molded part. The anti-icing characteristics of the protective coating under a low-temperature environment were studied using the protective coating as the research object. The contact angle test, freezing time test, and hydrophobic face ice adhesion test between liquid droplets and coating surfaces at low temperatures were completed by controlling variables.The results showed that temperature had a significant impact on the contact angle, with a decrease of 8% to 11% from 25 °C to 0°C, while the droplet salinity only gave a small effect on the contact angle. The inherent properties of coatings and droplet salinity had a huge impact on the ice adhesion on droplets and freezing time.Under the same droplet salinity, there are significant differences in the time of freezing and ice adhesion of droplets on distinct coating surfaces. However, as the droplet salinity increases from 0‰ to 35‰, the droplets on the protective coating surface freeze more slowly, the time increases by 64.7 seconds, and the ice adhesion decreases by 43.9%.