With the development of modern coatings, the strength, weather resistance and corrosion resistance of coatings have been improved. Correct selection of coatings and proper coating process are necessary conditions to improve the coating performance of glass fiber reinforced plastic storage tanks. There are several surface Coating technology has development prospects.

Dip Plating and Spraying Processes: Dip plating is suitable for small and regular workpieces, while spraying is suitable for large surface area and regular workpieces. FRP products are sprayed by this method, the coating surface quality is good, and the investment is not high. The key to this technology is to control the heating temperature and the proportion of additives in the coating structure. The quality of the coating is closely related to the viscosity and plasticizing temperature of the coating. The optimal quantitative index of the dip spraying process is 0.1-0.15mm film thickness, and the optimal process is inorganic water-based coatings. .

The price is high and the one-time investment is large. But it has a good protective and decorative effect.

The volatile substance after the coating is water, there is no environmental pollution, and the coating can be self-cleaning.

Spraying process: electrostatic spraying has high efficiency, uniform coating and low pollution, and is suitable for large-scale automatic spraying production lines. big different. The results show that FRP has good electrostatic conductivity.

Combining the plastic coating process with the properties of FRP products, the hot melt adhesive spraying process was developed. Similar to the electrostatic spraying process, but in the electrostatic spraying, the electrical conductivity requirement of the FRP product is ignored, and the powder plasticizing temperature is low. Due to the above advantages, this process is suitable for the FRP product with a larger matrix. The key technology lies in the T process of pretreating the surface of the FRP. and substrate temperature. The other is the powder impregnation process, which is suitable for the surface coating of high-temperature thick-walled FRP products, especially products with special functional requirements (such as FRP storage tanks) to increase the function of the product.