How thick is powder coating?

Usually about 60–120 µm, thicker than most liquid paint coats.

Can aluminium be powder coated?

Yes, with the right pre-treatment. It is common for aluminium profiles and enclosures.

Powder coating

Also called: powder coating job work, epoxy powder coating, polyester powder coating, powder paint

Powder coating sprays a dry, electrostatically charged powder onto metal parts and bakes it into a hard, even film. After proper pre-treatment it gives a tough, corrosion-resistant finish in almost any colour, without the solvents of liquid paint.

Quick facts

Steps: Cleaning and pre-treatment, spraying, curing in an oven
Typical film thickness: About 60–120 µm
Curing: In an oven at about 180–200 °C
Powders: Epoxy (indoor), polyester (outdoor), epoxy-polyester (general)
Colours: RAL shades, textures, gloss and matt
Usually priced: Per sq. ft, per piece or per kg

Pre-treatment matters most

Most coating failures start with poor cleaning. Parts are degreased, then given a conversion coating such as zinc phosphate (steel) or chromate-free treatment (aluminium), or shot blasted, before powder is applied.

Which powder

Polyester: good UV resistance, for outdoor parts
Epoxy: very good chemical and corrosion resistance, but fades in sunlight; indoor
Epoxy-polyester (hybrid): general indoor use

What to tell the shop

Colour (RAL number), gloss level and texture
Indoor or outdoor use
Areas to mask: threads, holes, earthing points
Thickness and any salt-spray test needed
Quantity and part sizes (oven size limits)

Need powder coating done?

Post your requirement free. Workshops that take your kind of work see it and get in touch. You only talk to the ones that fit.

Get started

Related job work

Machines

Press brake

Materials

Questions

How thick is powder coating?: Usually about 60–120 µm, thicker than most liquid paint coats.
Can aluminium be powder coated?: Yes, with the right pre-treatment. It is common for aluminium profiles and enclosures.

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 8 October 2026.