The effect of electrostatic spraying of anti-corrosion steel pipe depends not only on the electrostatic spraying equipment and management techniques, but also consider whether the coating varieties used meet the requirements of electrostatic spraying. Electrostatic spraying requires a low resistivity of the coating, the value of 5 to 50MΩ/cm is more appropriate. In addition to the resistivity of the coating and resin, but also with the choice of solvent has a great relationship. Therefore, in actual production, the method of adding solvent is used to adjust the size of its resistivity.
Anti-corrosion steel pipe selection electrostatic anti-corrosion coating main performance indicators include corrosion resistance, fast drying, stability, etc. The main characteristics of hard film antirust electrostatic anticorrosion agent RSH-3A and cleaning agent are high flash point, flame retardant, and long antirust period, which can generally ensure no rust in the maritime period for 3 months. RSH-3A has a surface drying time of 13min at 55℃, and the overall layout of the equipment is reasonably designed to meet the production requirements of a short and continuous operation of the spraying line.
It is worth mentioning that oil-based anticorrosive coating has high viscosity, harsh operating environment and flammability, which brings many troubles to environmental protection, so water-based anticorrosive coating is the trend of steel pipe anticorrosive development. CS-100, CS-200, C13-6 and other water-based anticorrosive coatings have better effect and can be applied according to customers’ different requirements for steel pipes.