When it comes to adding finishes to metal products, whether it’s building materials, hand tools or any other type of metal, one of the most popular types of finishes is a powder coating. Since this type of technology was introduced back in the 1960s, it is estimated that over 15% of all finishes applied to metal surfaces are done so through powder coating. When it comes to a durable finish, there is simply no option that is better. To understand why this is the case, it’s important to understand how the powder coating process works.
The powder coating works with a polymer resin that has various additives, leveling agents and pigments combined. This material is then mixed through a melting process, it is then cooled and the final stage is this resin is ground into a fine powder resembling flour in texture.
Powder coating is a dry finishing process and in the application phase, a specialized powder gun is sprayed adding an electrostatic charge to the powdered pigment. Once the powder is sprayed into the air with the electrostatic charge, the metal item that the finish is going to adhere to is grounded. The electrostatic charge allows the pigment to attract to the grounded metal item creating a uniform finish.
However, this isn’t the end of the finishing process. Once this coating is complete, the metal item will then go into a special oven. This heating allows for long molecular chains to be created. However, these molecular chains are known to be resistant to breaking down. This process creates a high-density coating and because of the molecular chains resistance to breakdowns, this process creates a finish that is extremely durable and that will last for many years to come.
In the past, powder coating was more of a specialized form of metal finishing. However, because the technology has improved and because of how widespread this type of finishing application is, the cost of powder coating is much cheaper. In addition, even if large quantities of products need to be professionally powder coated, the turnaround for these products are extremely quick as the finishing process can be done in a short period of time.