Powder Coating
A powder coat finish is a durable, corrosion-resistant finish which can be applied to aluminum, brass, bronze, copper, iron or steel - virtually any type of metal that can withstand heat and hold an electromagnetic charge can be powder coated. A good powder coating can last 15-20 years with good treatment, the correct type of powder, and excellent pretreatment conditions.
Powder Coating Process
PHASE ONE: Pre-Treatment
This stage is vital in allowing the paint finish to perform to its full potential. All paints are porous and will over time allow atmospheric conditions to permeate through the coating onto the metal. To safeguard against this, all substrates are chemically pre-treated in order to protect against corrosion and promote good adhesion.
PHASE TWO: Coating
After pre-treatment of the metal it is time for coating. The powder which is held in a fluidized hopper bed is carried to the spray gun using compressed air. As the powder passes out of the gun, the particles are charged and therefore attracted to the earthed piece of metal. This creates an even coating as it wraps around the work piece.
STAGE THREE: Curing
After coating, the item is then moved into the oven where it is baked. Once the curing is complete the substrate is inspected for defects, paint thickness, color and gloss level. Provided there are no issues, the product is packed and is ready for the customer.