Powder coating bridge supports involve applying a layer of plastic powder to the surface of cable bridge supports.
No need for thinner; construction is environmentally friendly and non-toxic to humans; coating has excellent appearance quality, strong adhesion and mechanical strength; short curing time for spray application; superior corrosion and wear resistance; no need for primer; easy to apply, low technical skill required for workers; lower cost than painting; some construction sites explicitly require the use of electrostatic powder coating process; no dripping occurs during electrostatic powder coating, unlike common in painting processes. It utilizes the corona discharge phenomenon to make the powder coating adhere to cable trays. The process is as follows: the powder coating is sent into the spray gun by the powder supply system using compressed air. At the front of the spray gun, there's a high-voltage electrostatic generator that creates high voltage. Due to corona discharge, a dense charge is produced nearby. When the powder is ejected from the nozzle, it forms charged coating particles, which, under the influence of static electricity, are attracted to the workpieces with opposite polarity. As more powder is applied, the charge accumulates more. When a certain thickness is reached, due to static repulsion, it stops adhering, allowing the workpiece to achieve a certain thickness of powder coating. The powder then melts, levels, and cures through heat, forming a hard coating on the workpiece surface.