Powder coating – also known as powder coating or powder painting – is an electrostatic painting process. Compressed air is used to spray negatively charged powder onto a grounded piece of metalwork. It makes the powder stick temporarily and blends in a heated oven. The result is many times stronger and more durable than, for example, wet coating.
Powder coating has a vast field of applications, ranging from components for solar panel systems to the automotive industry. It is also applied in the medical sector and by commercial companies. We always offer the best possible solution for the most diverse requirements, and cataphoresis lacquer may be used as a primer. To please the eye, we can realize almost any color, gloss and structure. Since NFB has several lines, we are also very flexible.
Because we do not use solvents for powder coating, the method is safe and friendly to people and the environment. We collect the excess powder and filter it thoroughly to use over 99% of the powder, saving costs and the environment.
What is powder coating used for?
- Cab mounts
- Profiles for sliding doors
- TV mounts
- Car mounting screens
- Visible car parts
- Parts under the chassis that are subject to heavy loads
- And much more
The process of powder coating
We usually hang the products directly onto the belt, and in exceptional cases, we stretch them outside the belt. A series of pre-treatments distributed over eight or nine zones automatically switches on, considering the client’s wishes and the manufacturer's ultimate application or prescribed standards. As we have multiple lines, we can switch readily.
The main steps of the powder coating pre-treatment are degreasing, rinsing, activation (iron phosphating) and passivation. The products then run through a technologically advanced and high-quality spraying robot installation to apply the powder coat.
Powder coating layer thicknesses
We determine the layer thicknesses in consultation with you. We can cover critical places, such as contact surfaces or screw threads, or vacuum them on the belt. The lacquer layer is fixed at 150°C – 200°C to achieve its final properties and appearance. The oven is designed in such a way that heavier parts can also be processed.
Powder coating consists of applying a dry layer of lacquer to a metal surface. NFB uses the ‘corona technique’. The powder is electrostatically charged and adheres to the grounded surface. Subsequently, the powder layer is fixed in a heated oven. The powder melts and coalesces, turning into a hard layer. By the way, most powders are based on epoxy or polyester resins or a combination of these.