What is electrostatic powder coating? What are its advantages and areas of use?

What is Electrostatic Powder Coating?

Electrostatic powder coating is the adhesion of powdered paint to the metal surface by passing it through a device consisting of an electronic and pneumatic system. As the powder paint passes through the device, it reaches high voltages thanks to the transformer inside and creates a static field between the metal surface to be painted and the powder spray gun. Thus, the negatively charged powder paint particles move towards the grounded metal surface, i.e. the positive field, and adhere (Coulomb's Law). Since the powder paint particles also apply repulsion force among themselves, they are homogeneously distributed on metal surfaces. The material whose surface is coated with paint is baked in industrial ovens to ensure permanent adhesion of the powder coating to the surface.

What are the Advantages of Electrostatic Powder Coating?

It does not contain any additives and solvents. Solvents, which are very common in wet paints, mean an extra input for companies. There is no such input in powder coating. One of the biggest advantages of powder coating is that the paint that does not stick on the material is collected and recycled through cyclones. It is also very efficient in terms of time compared to wet paint, it is sufficient to bake at 180-200 ° C for 10-15 minutes after the material is painted. There is no need for flash-off time in the wet dyeing process. The dyed or deformed material can be repainted and baked without any treatment.

Areas of Use

  • Aluminum industry
  • Steel door industry
  • Machine industry
  • Lighting industry
  • White goods industry
  • Automotive supply industry
  • Metal furniture industry
  • Steel shelf industry
  • Tables, chairs, door handles, grilles and stands
  • Park garden furniture and fencing 
  • Children's playgrounds 
  • Agricultural tools and equipment 
  • Electricity panels, poles
  • Vehicle Rims and accessories
  • Pathology laboratory equipment
  • Electrostatic powder coating can be applied on many metal surfaces.

Technical data

With 1 kg of powder paint, an area of 10-15 m² can be painted with a thickness of 50-55 microns.

➝ Coating(m²/kg)=(10 * % Utilization)/(Film thickness x Self weight)

Halil Kırmızıgül

Electrical & Electronics Engineer