According to statistics, powder coating is one of the most popular dry finishing techniques, accounting for over 15% of the overall industrial finishing industry. Powder coating is an advanced method of applying a decorative and protective finish to a wide range of materials and products used by both industries and consumers. The following are the basics of this method.
1. How Does Powder Coating Work?
Powder coating is a type of coating that is applied as a dry powder. It is then cured under heat to form a hard finish that is both scratch and chip resistant. The powder used comprises finely ground particles of pigment and resin. When the powder is applied to the metal surface, it bonds to the surface and creates a smooth, even finish.
2. What Are the Benefits of Powder Coating?
This method is an extremely durable finish that can withstand high temperatures, UV rays, and chemicals. It is also a very cost-effective option compared to other types of finishes. This coating can also be applied to various metals, including aluminum, steel, and brass.
In addition to its durability, this coating also offers a wide range of color options. Powder coating is available in various colors, including metallics, pearls, and even fluorescent colors. This makes it easy to create a unique look for your products.
3. The Different Types of Powder Coatings Available
There are two main types of powder coatings available: thermoset and thermoplastic. Thermoset powder coatings are cured at high temperatures and create a very hard, durable finish. Thermoplastic coatings are cured at lower temperatures and are not as durable as thermoset coatings. However, they offer a wide range of color options and can be easily repaired if they are damaged.
4. How to Prepare Your Surface for Powder Coating
It is essential to ensure that your surface is clean and free of any grease or oil before starting this process. The surface should also be sanded down to ensure that the coating adheres appropriately. If you are using this method over an existing finish, it is crucial to ensure that the old finish is in good condition and free of any defects.
5. How to Apply the Powder Coating
Powder coating can be applied using a variety of methods, including electrostatic spray guns and fluidized beds. When using an electrostatic spray gun, the powder is charged as it is sprayed onto the metal surface. This helps to ensure that the powder adheres evenly to the surface. Fluidized beds are also commonly used for powder coating. In this method, the metal surface is dipped into a powder container. The powder then adheres to the surface and is cured under heat.
6. The Curing Process
After the powder coating has been applied, it needs to be cured. The curing process involves heating the powder-coated surface to a high temperature. This helps to set the finish and create a hard, durable surface. It can be cured using infrared lamps, convection ovens, or forced air drying cabinets.
This method is a great option for businesses looking for a durable, long-lasting finish. With proper preparation, this process can create a smooth, even finish that is both scratch and chip resistant. If you are interested in learning more about this, check out our blog post on the different types of powder coatings available.