Powder coating is essentially a dry process. With powder coating there is virtually an unlimited choice as far as colouring of extruded aluminium profiles are concerned. It is suitable for both indoor and outdoor use. The powder used for coating is essentially a mixture. It uses a combination of finely ground particles of resin and pigments. It is the penetration capacity which is the critical factor for achieving quality results.
Take a look at the following image and it would be clear, what a powder coating does to enhance the surface appearance of the profiles.



Advantages of Powder coating
Some of the advantages offered by powder coatings in context of aluminium extrusion is given below:

• Excellent age-resistance properties
• Deep penetration
• High level of repeatability
• Good resistance to UV
• Resistance to knocks and wear
• Can result in much thicker coatings as compared to conventional liquid coatings
• Wide range of speciality effects
• Unlimited colour choice
• Environment friendly method

Features of Powder coating
The features and characteristics of powder coating are enumerated in the form of a table that follows.

Properties	Polyester	Epoxy
Indoors	Recommended	Recommended
Outdoors	Recommended	Recommended
Ultraviolet resistance	Very good	Good
Corrosion resistance	Very good	Very good
Chemical resistance	Good	Very good
Resistance to wear	Very good	Very good
Adhesion	Very good	Very good
Colour agreement	Very good	Very good