Powdercoating is a process where metal products are covered with a free-flowing, dry powder which is baked on at very high temperature.
A powder coated finish is recognised as one of the most durable surfaces available and depending on its installed location and regular maintenance, you can be assured of a great looking finish that will last for many years.
Note: Powder manufacturers do not offer warranty on coatings on steel or hot-dip galv within 5kms of a coastal location.
Pre-treatment is required before poweder coating. A solution of hot water and iron phosphate with special detergents is used to remove dirt and oils. This leaves the galvabond tube with a protective iron phosphate coating.
Panels are then placed on an overhead line ready for powder coating. The powder is applied by an electrostatic hand gun.
All panels and fittings are batched by colour and loaded into the gas oven for firing. A thermostat reaction occurs at 200 degrees centigrade, melting the powder. As the oven cools the molten powder hardens to form the cured layer of colour coating.
Before aluminium can be powder coated it must go through a five-stage pre-treatment process. This involves panels being submerged in various chemical solutions for a specified time as set out in AS3715.