Surface Treatment Related, Industry Knowledge

Surface Finishing：What is powder coating?

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being powder-coated parts

Powder coating is a widely used dry surface finishing technology in industrial manufacturing. It relies on electrostatic adsorption to attach dry resin-based powder evenly to metal workpiece surfaces, followed by curing in an oven at 160–200℃. This process forms a dense, tough coating that delivers exceptional protection and aesthetics.

  • Eco-friendly: Contains almost no volatile organic compounds (VOCs), and over 95% of oversprayed powder can be recycled, minimizing material waste.
  • Superior coating performance: Offers strong adhesion, scratch resistance, corrosion protection, and weather durability, with uniform thickness across complex workpiece shapes.
  • Versatile & efficient: Suitable for mass production, with a wide range of color and finish options (e.g., matte, high-gloss, textured). It also achieves special effects like sand texture or hammer tone.
Main differences between powder coating and liquid painting for metal surfaces:
AspectPowder CoatingLiquid Painting
MaterialDry powder (no solvents)Liquid paint with solvents
ProcessElectrostatic spray + high-temp curing (160–200℃)Spray/dip + air dry/low-temp bake
Eco-friendlinessLow VOCs, overspray recyclableHigh VOCs, overspray wasted
DurabilityTough, scratch/corrosion-resistantLess durable, easier to chip/fade
FinishMatte, gloss, textured (limited color blend)Wide color/effect options (metallic, pearlescent)
CostHigher setup cost, lower long-term wasteLower setup cost, more material waste

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