Painting – powder coating

In mid-2007 we built a powder coating plant  shop in our Halenkov facility. Powder coating is a modern technology for metal surface treatment. It meets strict environmental criteria and guarantees quality surface treatment of metals with powder paints. Part of the preparation of the material before applying powder paints is thorough degreasing of the material surface, which is carried out in our plant in a W2005.3 degreasing machine. For degreasing we use a water solution with the addition of DURIDINE 3803 it, tempered to between 50 and 55 °C. The degreasing agent also forms a protective layer of ferric phosphate several tenths of a micron thick on the surface. The phosphate layer is firmly embedded in the material surface and significantly improves the adhesion of the paint. After the degreasing process is completed, a double rinse with cold water is performed, followed by drying of the surface of the material.

Today, virtually all powder coatings are applied by spraying in an electrostatic field. What happens is that the powder particles become electrically charged while the object being painted is grounded. The resulting electrostatic attraction force is sufficient to form an adequate layer of powder on the object, holding the dry powder in place until it melts and adheres to the surface in the 180 °C firing furnace. Our equipment includes 3x MAJKA 1629 coating booths (1820 x 1960 x 1400 mm – width x height x depth) and 2x H+V Grygov firing furnaces.

To "charge" the powder, we use two principal methods:

• electrostatic charging
• tribostatic (kinetic) charging

In addition to powder coating, we can also do wet coating.

If there are other customer requirements, we provide surface treatment by:

• cataphoretic painting
• blackening
• electroplating
• thermal treatments
• hot-dip galvanising