Difference between radiator spray painting and powder coating

Powder coating and spray painting are two common surface treatment processes for radiators, both aimed at anti-corrosion, rust prevention, and beautifying the appearance. However, there are significant differences in process principles, performance characteristics, and applicable scenarios. Below is a detailed comparison from multiple dimensions:

1、 Different process principles

· Spray coating (powder coating)

· Using solid powder coating (mainly composed of resin, pigment, curing agent, etc.), the powder is charged by an electrostatic spray gun, adsorbed on the surface of a metal radiator, and then enters a high-temperature oven (usually 180-220 ℃) for curing. The powder melts and crosslinks to form a uniform solid coating.

· Characteristics: solvent-free, relying on electrostatic adsorption and high-temperature curing, with a thick coating thickness (generally 50-150 μ m).

Spray painting (liquid spraying)

· Using liquid coating (composed of resin, pigment, solvent, additives, etc.), the coating is atomized by a spray gun and sprayed onto the surface, and cured into a film by solvent evaporation or chemical reaction.

· Characteristics: It relies on solvents (such as paint thinners) to dissolve coatings, resulting in thin coatings (usually 10-50 μ m) that require multiple sprays to achieve a thicker thickness.

2、 Performance comparison