Language

Electrostatic Painting and Lacquering

Quimarte | Services | Electrostatic Painting and Lacquering

Electrostatic Painting

Electrostatic painting is a coating process that uses electrically charged liquid paint. The paint particles, which carry a positive charge, are attracted to the metal surface of the part, which has a negative charge, ensuring a uniform and controlled application. After application, the part is subjected to thermal curing in an oven, where the paint polymerises and forms a continuous, resistant and durable film.

How does the process work and where is it applied?

Electrostatic painting begins with surface preparation, which includes degreasing, abrasive blasting (when necessary), and chemical adhesion treatment. Then:

    • The paint is applied using an electrostatic spray gun.
    • The particles adhere to the part through electromagnetic attraction.
    • The part enters a curing oven where, at temperatures between 140 and 160 °C, the powder melts and cures.

The finish is uniform, without drips, and offers excellent mechanical and chemical resistance. The coating thickness ranges between 40 and 80 microns, depending on the function of the part and the paint selected.

At Quimarte, this process can be complemented with the application of a protective varnish, for glossy, satin or matte finishes, ensuring higher chemical resistance, colour stability and UV protection. Our varnishing process is ideal for metal parts that require mechanical protection, uniform appearance and long-lasting performance in indoor or outdoor environments.

Pintura - Vermelho
Pintura - Roxo
Pintura - Castanho
Pintura - Branco

Varnishing

Electrostatic varnishing is a technical process in which liquid varnish is applied to metal surfaces using the same principle as electrostatic painting: the varnish is electrically charged and adheres uniformly to the part. The part is then cured in an oven at high temperature, where the varnish melts and forms a transparent protective film.

Thermal curing: The part is placed in an oven between 120 °C and 140 °C, where the varnish melts and polymerises, forming a uniform film.

This coating creates an invisible, resistant and stable protective layer that extends the durability of the original metal finish, whatever it may be.

Advantages

  • Aesthetic Finish
  • Resistance to Impact and Scratches
  • Protection against Corrosion, Humidity and UV
  • Wide Range of Colours
  • Decorative Coating

Typical Applications

Painting and varnishing are extremely versatile and are used in:

Exterior Metal Components

Metal Caps

Luxury Pieces

Footwear Components

Fashion Accessories

Perfume Caps

Frequently Asked Questions

The choice of finish depends on the application. For chemical or electrical resistance and for use in outdoor environments, electroplating is generally more suitable. Painting offers excellent physical and visual protection and can be combined with zinc plating or nickel plating to increase durability.

With proper curing and correct surface preparation, durability can exceed 15 years in outdoor environments, especially when preceded by zinc plating treatment.

We offer a wide range of colours and can develop custom colours upon request.

No. Varnish is applied optionally to increase gloss, protect against scratches or reinforce UV and chemical resistance. It is commonly used on decorative or technical parts exposed to demanding conditions.

No. The varnish is transparent and applied in a thin layer, maintaining the original gloss. However, it is possible to adjust the level of gloss if desired.

Yes. The varnish acts as a physical barrier against oxidation, especially on parts with galvanic finishes, preventing loss of shine over time.

Yes, varnish is suitable for outdoor use, especially when using UV-resistant varnish designed for exterior environments or areas subject to temperature variations.

Yes. The electrostatic process ensures good coverage even on irregular shapes, as long as there is access for uniform deposition.

Get in Touch Other contacts

We have a team ready to help you!