Powder coating
Finishing at the highest level
Your benefit
The powder coating process offers numerous advantages:
- High-quality, even surface
- High economic efficiency
- High resistance and durability
- Immediately ready for use after coating
Our plant
Whether individual parts or large series, whether the size of a tennis ball or a small car – we coat metallic components to perfection:
- max. Dimensions: 4000 mm x 2000 mm x 2000 mm
- max. part weight: 1500 kg
- Several pre-treatment circuits for a wide range of materials: steels (with/without galvanizing), aluminium, etc.
Contract coating
In addition to finishing our own projects, we also offer our coating expertise for your parts and assemblies.
For example, we coat for customers in Saarland and throughout Germany:
- Welded assemblies
- Sheet metal components
- Rims and other automotive parts
- Motorcycle parts and frames
- Facade cladding
- Design objects
- and much more...
You can find detailed information on coating rims and vehicle parts here:
Example projects
Are you looking for a partner for your coating tasks?
We look forward to your inquiry:
How powder coating works
1) Pre-treatment
To ensure that the paint coats adhere optimally to the substrate, the surfaces of the components to be coated are pretreated.
Depending on the material and the corrosion protection requirements of the component, various pre-treatment methods are available.
Thermal pre-treatment (tempering)
The component is heated to achieve the desired effect on the surface:
If components are to be coated that already have a protective layer created by other means (e.g. galvanizing), outgassing could occur during the curing process of the powder coating.
This would damage the coating layer.
To avoid this, the components are heated in the oven chamber for a certain period of time before coating.
The gases that form in the protective layer can escape freely and no longer occur during subsequent heating.
This means that a safe coating is possible after tempering.
Chemical pre-treatment
The surface of the components is treated with chemical substances:
Pickling
A pickling agent is used to thoroughly clean the metal surface of grease residues, scale and other impurities. After this step, the metal surface is clean and ready for a subsequent pre-treatment step.
Phosphating
The metallic surface reacts with an aqueous phosphate solution and forms a surface layer ("conversion layer") of strongly adhering metal phosphates. This improves corrosion protection and increases the adhesion of subsequent paint coats.
Passivation
The formation of an inert ("passive") surface layer is achieved by using an oxidizing agent.
Mechanical pre-treatment
The component surface is cleaned by mechanical action.
A distinction is made between the following variants:
Loops
A grinding machine is used to roughen the component surface and remove adhering layers of dirt.
Sand or glass bead blasting
By bombarding the metal surface with a fine blasting material such as corundum or glass beads, unwanted surface layers such as rust or scale are removed and the base material is exposed.
2) Application of the powder coating
Powder-coated components are characterized by an extremely uniform surface appearance.
The key to this lies in the process by which the powder coating is applied to the component surface.
The compressed air that transports the powder coating and blows it out of the gun nozzle is electrically charged.
The component is electrically charged in the opposite direction.
As a result, the powder is electrostatically attracted to the component and adheres evenly to its surface.
3) Stoving the powder coating
After application, the powder coating only adheres loosely to the component.
To ensure that the powder particles bond firmly to each other and to the component surface, the component is heated in an oven chamber.
Depending on the component size and powder type, the curing temperature and duration must be selected so that the paint particles first melt, cross-link and then solidify to form a stable layer.
As soon as the stoving process is complete and the workpiece has cooled down, the coating is finished and ready for use.
