Clean and shiny surface

Effective cleaning and protection of non-ferrous metals.

Chemical polishing of copper and brass (bright deeping)

Chemical polishing of copper and brass, known as bright deeping, is a process of chemical etching of non-ferrous metals, which effectively cleans and polishes the surface of the material. Thanks to this method, copper and brass surfaces gain a high gloss and smoothness, which is important for both aesthetic and functional reasons. After the polishing stage, the elements undergo a passivation process to protect them from rapid oxidation and corrosion.

During chemical polishing, components are etched in special solutions that gently remove impurities and irregularities while polishing the metal surface. This process is environmentally friendly — it does not emit nitrogen oxides, which makes it a green technology. The next stage is surface passivation, carried out without the use of hexavalent chromium, which minimises the negative impact on the ecosystem. Passivation provides temporary corrosion protection, significantly extending the service life of the components.

The process is carried out both in baskets and on hangers, which allows for flexible adaptation to production requirements and the type of parts.

Process parameters

  • Green process without nitrogen oxide emissions during digestion
  • Passivation without hexavalent chromium, environmentally friendly
  • Passivation providing temporary corrosion protection
  • Process implementation using baskets and hangers

Production capacity

The production capabilities of the chemical polishing process for copper and brass include work on modern automated lines, both in baskets and on hangers, enabling the processing of components of various sizes and shapes. Thanks to the high flexibility of the technology, we ensure repeatable surface quality and efficient execution of both small and large production runs, meeting industry and environmental requirements.