Powder coating is the most widely used surface protection procedure. It is used for workpieces where electrostatic charging of the surface is possible and can be heated to a specific temperature in the furnace.
Powder coating is the most economical, and most widespread, surface treatment process in the metal industry.
The benefits of powder coating:
- the number of color combinations is endless
- a cost-effective way of coating
- environmentally friendly process
- fast and productive technology
Powder coating technology
The workpiece is cleaned of contaminants using a chemical process to ensure a secure adhesion and perfect corrosion protection. After pre-treatment, the coloured resin is sprayed with a special electrostatic spray gun.
The scattered powder paint layer becomes elastic under the influence of heat in a furnace and spreads evenly over the surface of the metal, resulting in a final, colourful or colourless, resiliently cured abrasion resistant surface.
The powder coating is done with the most up-to-date equipment in our brand new operating area.
Size of workpieces: 4,000 x 1.600 x 900 mm
Maximum workpiece weight: 200 kg
Conditions for powder coating:
- clean workpieces
- technological holes
- heat resistance
Compliance with powder coating products
The workpiece surface must be free of chemicals, oil and silicone.
After powder coating the irregularities and injuries become more visible, therefore they must also be free of mechanical damage.
If rust and/or other contaminants are present on the surface, preventive surface cleaning (eg. blasting) is required, which may involve additional costs.
Materials to be painted must be equipped with technological holes (even before delivery). It is important since there is a lack of coating in these places, it is advisable to create them in an invisible place.
The welds of the welded structures, (tubing and tube) should be free of gaps or partially open with holes in order to allow the liquid material inside the workpieces to escape during pre-treatment.
The workpiece should withstand a temperature of 180-200 ° C during the entire curing time (about 40-50 minutes) without deformation (e.g. melting) of the material itself.
If the workpieces to be coated contain unobtrusive or hidden contaminants (eg silicone, oily, greasy lubricant, insulating or adhesive), the material leaking onto the surface will damage the coating during curing. This may require rework and involve additional costs.
For special powder paints, coatings with metallic inks containing metal particles result in special colours that can mislead the human eye. In some places, the surface may be seen as a different colour or blotchy.