Powder coating is a dry finishing process that is commonly used on metal parts. It involves applying a dry powder that consists of polymer resin, flow modifiers, leveling agents, and other additives. The powder is then electrostatically charged and sprayed onto the metal part. Finally, it is cured under heat or with ultraviolet light. The result is a durable and attractive finish that is resistant to chips, scratches, and fading.
In order to properly apply a powder coating, proper surface preparation is essential. This may include cleaning the surface with a suitable solvent, or abrasive blasting the surface, to remove any dirt, oils or rust. After preparing the surface, the powder coating is applied using a spray gun, and cured in an oven at high temperatures, typically between 350°F and 450°F, for a specific amount of time, depending on the type of powder coating being used.
There are some common issues that can arise during powder coating application, such as poor charge, low film build, and insufficient wrap. These issues can cause the coating to look bad, with a grainy effect or tight orange peel. It is important to address these issues as soon as possible to ensure a high-quality finish.
Powder coating can be applied to a wide range of CNC machined parts, including automotive components, industrial equipment, and furniture. It has the added advantage of being resistant to corrosion, scratching, chipping, and splintering which makes it a popular choice for many applications.
Powder coating is used in various industries such as manufacturing, architecture, agriculture, appliance, energy, aerospace, automotive and many others that require durable finishes for their products. Powder coated products can be found in everyday items such as lighting fixtures, antennas, electrical components, tractors, farm equipment, golf clubs, snowmobiles, bicycles, and exercise equipment.