What is powder coating?

Powder coating is an advanced method of applying a high quality decorative finish to a wide range of materials and products that are used by industries businesses and consumers.

Finely ground particles of pigment and resin are sprayed onto a surface to be coated. The charged powder particles adhere to the electrically grounded material and are fused into to smooth coating in a curing oven.

Powder coating provides architects, designers and manufacturers with one of the most economical, long-lasting, and colour-durable quality finishes available. This modern surface coating system is a high-finish application that is extremely decorative and more resistant to chemicals, chipping, fading and wearing than other finishes.

Almost every design palate is catered for with a wide range of colours, finishes and textures and the system can be applied to a variety of surface finishes and fabrication.

As one of the fastest growing finishing technologies in the world, powder coating is also extremely cost-effective when set against labour intensive traditional liquid coatings.

It is also virtually pollution-free, with very little wastage in the application process, containing no solvents and producing almost zero volatile organic compounds.

Powder coating is finished to the British Standards BS EN 12206 : 2004 and BS EN 13438:2013 and, when applied to galvanized or aluminium materials, carries a guarantee across the full finish range.

What are the benefits of Powder Coating?

  • High quality surface finish
  • Weather and corrosion resistant
  • Virtually maintenance-free
  • Long life expectancy
  • Cost-effective
  • Quick application
  • Range of quality colours and finishes
  • Environmentally friendly
  • 25-year guarantee to aluminium material

What is the Powder Coating process?

The Powder Coating process we undertake here at NK Coatings…

All items are logged and tracked though our computerized order system.

Our Quality team will check materials for suitability and preparation. All materials for powder coating must be vented correctly. (See data in galvanizing section).

Fabricated sections are jigged and racked for efficiency and ease of handling.

Our commitment to producing a high quality finish is manifect in our rigorous pre-treatment process. This is the single-most important part of the powder coating process and the foundation to the NK guarantees.

All materials are chemically cleaned and de-greased to remove all contaminants from the surfaces to be coated. This ensures maximum adhesion of the paint film and guarantees long term corrosion resistance.

Materials are rinsed to flush out remaining soils and to dilute residual acid clean solution.

Conversion coating
This promotes the bonding of the powder to the metal surface and increases the resistance to under-film corrosion from moisture.

Sealer rinsing
After the conversion coating is applied a chemical rinse is applied which acts as a final passivating treatment – further enhancing the anti-corrosion performance of the system.

Necessary to remove excess moisture and allow maximum powder adhesion.

Powder Application
The powder is applied using electrostatic spray units that offer maximum control over powder thickness and coverage. The airflow in the booth moves the electrically charged powder particles toward the grounded material. The electrostatic charge between the two attracts the powder and adheres it evenly and smoothly on the surface.

The coating material is heated rapidly to a temperature of 200 degrees C and cured for approximately 10 minutes, depending on it properties, inspected and left to cool.

Quality Inspection
Our Quality Control procedures have allowed us to pursue the highest European kitemark in powder coating applications as a qualicoat approved company.

Back by the commitment to quality, we can offer a unique guarantee on matt, satin and gloss powder finishes on galvanized and aluminium products.

Goods are packaged carefully to protect materials during transit.