Powder Coating Aluminium for a Decorative Finish
Powder coating aluminium is a very durable method of providing a decorative finish and there are virtually no limits to the choice of colour and finish. The main finish reflects the gloss level of the final product, usually being Gloss, Satin or Matt but there is also a choice between Flat Finish and Metallic.
Some examples of where powder coating aluminium is common are in lighting, curtain tracks, doors and windows, office furniture and in shop fittings.
Powder coating is also suitable for products and components that live internally or externally; it is down to customer choice as to how they want their finished part to look.
The Process of Powder Coating Aluminium
The powder coating process involves three basic steps; preparation or the pre-treatment, the powder application and then the curing.
The appropriate pre-treatment process normally consists of degreasing and etching, followed by a chemical treatment of the surface. This process helps the coating adhere to the metal.
The most common way of applying aluminium powder coating is to spray the powder using an electrostatic gun. The gun imparts a positive electric charge to the powder, which is then sprayed towards the part by mechanical or compressed air spraying and then accelerated toward the part by the powerful electrostatic charge.
The part is then heated and the powder melts into a uniform film, which then cools to form a hard coating
Powder coating produces a high specification coating that is tough, hard, and abrasion resistant.
Wet painting used to be a widely used surface finish that has now almost totally been replaced by powder coating, due to the fact that powder coating aluminium has a number of quality benefits and considerably lower environmental impact.See Aluminium Welding