Powder Coating

Add Powder Coating for just £10 per wheel!

What is powder coating?

Powder coating is the electrostatic application of organic powder to metal parts requiring protective or decorative coating. The powder is cured by heating or baking, resulting in a hard, continuous coating. To understand why powder coating is more advantageous than wet paint, it’s important to first understand the process.

The powder coat process includes pre-treatment, powder application and high-temperature powder curing. The process begins with pre-treatment/surface preparation of the substrate. Each part is cleaned, removing grease, dirt and anything else that might interfere with the painting process.

This may include abrasive/mechanical or chemical cleaning, though it usually consists simply of cleaning the metal surface and pre-treating it in some fashion (e.g. phosphating) to prepare the surface to bond well with the powder during the curing process that follows as well as providing a degree of corrosion resistance. Without proper pre-treatment, the powder on a part will chip and corrode easily.

How is powder coating applied?

Following pre-treatment, the object must be completely dried before powder is applied. This can be accomplished using oven drying or air drying. If an oven is used for the drying process, the part usually must be cooled before the application of powder coating. Once completely dry, the part is ready to have powder applied using either spray techniques. The powder is electrically charged as it is applied to the part, giving each particle of the powder a negative charge.

The part being powder coated is electrically grounded as a means of attracting and attaching the powder to the part’s surface. This electrostatic attraction is a key requirement of the process, aiding the coating evenness and the speed of applying the coating.

The result is a uniform coating of dry powder clinging to the part. After the part is coated with powder, it is moved into a conveyorised curing oven. There the powder gels, flows and cures to produce a smooth, durable powder coat finish.

How durable is powder coating?

Powder coatings are more durable and more resistant to corrosion, chemicals and weather than liquid coatings. Powder-coated surfaces are more resistant to chipping, scratching and other such wear due to the thermal bonding process during curing. Unlike wet paint, powders also don’t run or drip, providing a more uniform coating than liquid paint.

The result of using powder coating is that the product will have the most attractive, durable, high-quality finish available.

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