Powder coatings
Powder coating is one of the most popular methods for the protective and decorative coating of metal parts. It involves the application and drying of powder paint on a prepared surface detail (melting of powder) at a temperature (about 180-200 oC). There are two basic methods of application: electrostatic and tribostatic. The choice of the method depends on the specific details of the painting.
The use of powder coatings surpasses the corrosion protection coatings from paint solvents due to the lack of micro channels which arise during the evaporation of the solvent. Powder coating provides this additional security and aesthetic appearance. Powder paint coating has a high resistance to weather conditions and perfectly protects against corrosion. It is mechanically resistant and very aesthetic. In addition, powder coatings have hygienic certificates.
Stages of powder coating:
- preparation of the surface before painting, during mechanical treatment (sandblasting) or chemical processes. This is very important for the quality and aesthetics of the receiving surface;
- applying paint in special spraying compartments. The electrostatic properties of paints ensures good adhesiveness to painted elements, which translates into high painting performance;
- transporting of the painted elements to the furnace chamber, where annealing occurs.
