More about Powder Coatings

Click here to find Powder Coatings Manufacturers | Discuss Powder Coatings & Other Topics

Powder coatings are used on metals, glass and other materials to alter the texture, color and chemical and physical characteristics of the material’s surface. In addition to enhanced aesthetic qualities, powder coatings can provide better abrasion, chemical and corrosion resistance, more desirable friction performance and thermal and electrical insulation.

As its name indicates, powder coating is the application of powder material to a surface using an electrostatic, compressed air or fluidized bed technique. For this, manufacturers use electrostatic spray guns, spray booths, or fluidized containers. Once applied, an oven melts the powder, causing it to flow evenly across the surface. The finish then dries to a wear-resistant, even, and highly durable coat.

Before performing any powder coating process, manufacturers must ensure that the surface to be coated is free from any contaminants. This can be achieved through various cleaning methods, such sand blasting or chemical dip. Contaminants can cause numerous flaws and imperfections in the finish, and must therefore be eliminated before the powder coating process can take place. Further chemical treatment may also be required in order to prepare the surface for coating.

Coating types range from epoxies to acrylics. Polyester urethane and other synthetics are also used, as are certain hybrid mixtures. Each coating has its own set of advantages; for example, epoxies provide excellent chemical properties but low wear resistance, while acrylics offer exceptional wear resistance. The selection of coating will also help determine the type of application method employed.

A large assortment of products and components are treated to the powder coating process, including appliances, automobiles, furniture and glass. Powder coatings tend to perform better than many other paints and surface coatings, and in many cases offer a safer environmental alternative. Additionally, they offer a means to enhance the appearance of parts that would otherwise be difficult to paint, color or alter.