Powdercoat Gun

Powder Coatings are based on polymer resin systems, combined with curatives, pigments, leveling agents, flow modifiers, and other additives. These ingredients are melted, mixed, cooled, and ground into a uniform powder. A spray gun is used to apply an electrostatic charge to the powder particles, which are then attracted to the grounded part. After the powder coating is applied, the parts must go through a curing oven. The heat causes the coating to bake to a fluid state that bonds the paint to the metal surface.

Powder coating protects the roughest toughest machinery as well as the household items you depend on daily. It provides a more durable finish than liquid paints can offer, while still providing an attractive finish. Powder coated products are more resistant to diminished coating quality as a result of impact, moisture, chemicals, ultraviolet light, heat and other extreme weather conditions. In turn, this reduces the risk of scratches, chipping, abrasions, corrosion, fading, and other wear issues. It's tough. It looks great. And it lasts a long time. In addition to being durable, powder coating is an attractive choice due to environmental advantages.

Beyond the cleanliness of the substrate, the two biggest threats to a perfect finish are ones that contamination-control professionals know well: temperature and humidity. Extreme swings in either, or both, of these variables can cause an assortment of defects ranging from uneven coating to bumps or blemishes in the finish. In some industries, this can translate into a high loss of yield if a batch of product must be stripped and recoated because of obvious imperfections in the finish.

Stripping old paint or powdercoat is not limited to media blasting. For those who are on a budget there are chemical strippers that is used (RTFM) according to the directions work just fine. These contain a fraction of methlylene chloride. The so called safe strippers are sodium hydroxide (lye) and are not really great to begin with, do not work well at all at below 70F and will pit aluminum alloys. This included the professional strip shops. Hot lye (bye-bye) ! Some upscale shops use straight methylene chloride in a sealed vapor booth.

Powder coating is applied as a dry powder (polyester) and then cured in an oven. The part to be coated is grounded and the powder receives an electrostatic charge as it is sprayed and is attracted to ground. This keeps the coating in place until it is oven cured. Most painted metal products are currently powder coated. No hazardous waste is generated in the process. No solvents are used.

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