A powder coating plant cleans parts, sprays them with charged dry powder and bakes them so the powder melts into a hard, even coat. A full plant has a pretreatment section (degreasing, rinsing, phosphating), a spray booth with powder recovery, and a curing oven, either as a batch setup or a conveyor line.
Quick facts
- Sections
- Pretreatment, drying, spray booth, curing oven
- Pretreatment
- Dip tanks (often 7-tank) or spray tunnel
- Gun
- Electrostatic corona or tribo
- Curing
- About 180–200 °C for 10–20 minutes
- Types
- Batch (trolley) or conveyorised
- Fuel
- Diesel, LPG, PNG or electric
Batch or conveyor plant?
| Batch | Conveyor | |
|---|---|---|
| Output | Low to medium | High |
| Part variety | Very flexible | Best with repeat parts |
| Cost | Lower | Higher |
| Space | Smaller | Larger |
Good to know
- Pretreatment quality decides how long the coating lasts
- Oven size sets the largest part
- Powder recovery saves much of the overspray
- Colour change is faster on cartridge-filter booths
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Questions
- What is a 7-tank pretreatment?
- A dip sequence of degreasing, rinsing, de-rusting, rinsing, activation, phosphating and final rinse before powder coating.
- What temperature cures powder coating?
- Most powders cure at about 180–200 °C metal temperature for 10–20 minutes; check the powder's data sheet.
- Can aluminium be powder coated?
- Yes, with a chromate-free or chrome conversion pretreatment suited to aluminium.
The figures on this page are typical values for guidance, written by Diemeco from standard engineering practice. They are not a specification: confirm grades and properties with the relevant standard or the supplier's mill test certificate, and tolerances with your workshop. Last checked 23 October 2026.