Protective function：
Anti-corrosion, waterproof, oil-proof, chemical resistance, light resistance, temperature resistance, etc. Objects are exposed to the atmosphere and are eroded by oxygen and moisture, causing damage such as metal rust, wood decay, and cement weathering. The surface of the object is coated with paint to form a protective film, which can prevent or delay the occurrence and development of these damage phenomena, and prolong the service life of various materials. Therefore, the protective effect is a major role of the coating.
Decorative function：
Color, gloss, pattern and flatness. Objects made of different materials can be painted with colorful and colorful appearances, which can beautify the human living environment, and make a contribution that cannot be ignored for human material and spiritual life.
Other functions：
Marking, antifouling, insulation, etc. For modern coatings, this effect is becoming more important than the first two. Some modern paint varieties can provide a variety of different special functions, such as: electrical insulation, conductivity, shielding electromagnetic waves, anti-static generation, etc .; anti-mold, sterilization, insecticide, anti-marine biological adhesion and other biochemical functions; High temperature resistance, thermal insulation, temperature and temperature marking, prevention of flame retardation, ablation and thermal insulation, etc .; reflection of light, luminescence, absorption and reflection of infrared rays, absorption of solar energy, shielding of rays, sign color and other optical properties; , Self-lubricating, anti-spattering and other mechanical performance aspects; there are various functions such as anti-noise, vibration reduction, sanitation, anti-condensation, anti-icing, etc. With the development of the national economy and the advancement of science and technology, coatings will provide and play various updated special functions in more aspects.