Powder Coating Process Guide — Colors, Durability & Cost

Powder coating offers durable finish at competitive prices. Key advantages over liquid paint: near-zero VOCs, overspray reuse (up to 95%), uniform 60-120 μm thickness.

Process Steps

1. Pretreatment: degrease, phosphate
2. Dry: 80-120°C, 10-15 min
3. Apply: electrostatic spray gun
4. Cure: 180-200°C, 10-20 min
5. Cool, inspect, package

Common Defects

• Orange peel: adjust flow/temperature
• Pinholing: check pretreatment
• Poor adhesion: verify phosphating
• Fat edges: reduce voltage, adjust distance

Color Options

RAL standard. Most suppliers stock 20-30 colors. Custom: 3-5 days. Finishes: gloss (70-95°), semi-gloss, matte, textured, metallic, anti-bacterial. Typical cost: ¥8-25/kg including labor.