Services - Powder Coating

Edmonton's Premier Coating Specialists

POWDER COATING

What is Powder coating?

It looks like paint, but acts like armor. It’s tough, looks great, and lasts a long, long time. Powder coating is a superior finish that’s found on hundreds of products you come in contact with each day. It makes products durable, attractive, and scratch-resistant, too. Finally, what can be powdercoated? The opportunities are endless, as anything metal that can withstand the ovens temperature can be coated!

Background Info

Powder Coating has been around for about 50 years. It was developed when they found a formulation for a finely ground “plastic” powder. That was the beginning of the powder coating industry. Powder Coating does not use solvents, there are no toxic chemicals released into the air, It is particularly beneficial for parts exposed to harsher conditions such as moisture and chemicals. Powder coating does not fade and is very chip and crack resistant, flexible, and can be applied to all metals. It is a dry coating, applied as a free-flowing, dry powder. The main difference between a conventional liquid paint and powder coat is that the powder coating requires no solvent to keep the binder and filler parts in a liquid suspension form. The coating is applied electrostatically and is then cured via heat to allow it to flow and form a tough “film.” It is created with a hard finish that is much tougher than conventional paint

The Powder Coating advantage:

Powder coatings emit zero volatile organic compounds (VOC)

Powder coatings can produce much thicker coatings than conventional liquid coatings without running or sagging.

Powder coating produce’s less hazardous waste than conventional liquid coatings.

Powder coated items generally have fewer appearance differences between horizontally coated surfaces and vertically coated surfaces than liquid coated items.

A wide range of specialty effects are easily accomplished which would be impossible to achieve with other coating processes.

The powder coating process involves three basic steps:

1. Preparation

At Impact Coatings Inc. we strive to give you the best-finished product possible because of this, preparation is KEY. Removal of oil, soil, lubrication greases, metal oxides, welding scales etc. is essential prior to the powder coating process. We use Chemical pre-treatments occurring in multiple stages. Degreasing, rinsing, phosphating and then rinsing for a second time is the most common for a variety of metal. An aluminum chromate or Alodine solution is used to clean aluminums as it etches the surface. The pre-treatment process both cleans and improves bonding of the powder to the metal. Another method of preparing the surface prior to coating is Sandblasting. We use only the finest grade aluminum oxide; Approximately 50% lighter than metallic media, the aluminum oxide abrasive has twice as many particles per pound. The fast-cutting action minimizes damage to thin materials by eliminating surface stresses caused by heavier, slower cutting media. It is also very low in oils so you have a grease free finish.

2. Powder Application

The powder sprayed using an electrostatic gun. The gun imparts a positive electric charge on the powder, which is then sprayed towards the grounded object by compressed air spraying and then accelerated toward the work piece by the powerful electrostatic charge.

3. Curing

The object is then heated at 215°C (420°F) for 25 minutes, where the powder begins to melt, flow out, and then chemically reacts to form a higher molecular weight polymer a network-like structure. It is then taken out of the oven where it cools for any given amount of time. The powder coating process is now complete.