Electro coating

Cataphoresis is one of the state-of-the-art technologies used for lacquer coating on various types of metal objects – especially on steel, aluminium, cast iron and galvanised items – to ensure their anticorrosive protection. The method is also known as electrocoating and uses the phenomenon of electrophoresis. It consists in coating the object immersed in water-thinned paint by means of electric current. This way the object is coated with electrically charged paint particles moving on the electric field lines, due to which the paint can reach all the places inaccessible to any other method of coating. Thickness of the coating depends on the value of voltage and it can range from 10 to 50 micrometres.

Cataphoresis is a relatively new technology developed after a series of tests carried out on anaphoresis – another method discovered and applied for the first time in 1963. The difference between the two methods lies in the process: in anaphoresis the coated item is the anode whilst in cataphoresis it is the cathode. In 1971 electrophoresis was first used for coating the industrial equipment. Shortly afterwards it was also applied in the OEM sector (coating of entire cars and lorries) since the cataphoretic layer put on an item of even a very complicated shape is highly resistant to atmospheric factors. Therefore, it efficiently protects the metal item from the destructive influence of corrosion on the parent material. The created coating meets the high resistance requirements, which was confirmed by the results of the tests conducted in aggressive environments, i.e. in the presence of moisture, heat and salts (e.g. up to 1.000 hours in salt spray chamber). Furthermore, the coating is very aesthetic and the whole process causes only a little environmental nuisance due to small amount of sewage and of volatile pollutants emitted during the polymerisation. Electro coating is also a very efficient process which results in its competitiveness when compared to other methods. The only weakness of the coating is its lower resistance to UV radiation. That is why an appropriate protection of the surfaces directly exposed to UV rays is recommended.

The electro coating installation system is a line consisting of a row of baths used for the processes of: surface preparation (including zinc phosphatising), paint coating and polymerisation.

The first task while preparing the surface is its degreasing. Therefore, all the elements intended for coating cannot contain hard to remove contaminants, foreign matters or corrosion centres.

The second task is coating the contamination-free surface with a microcrystalline, hermetic and properly thick layer of zinc, nickel and manganese phosphates. The layer ensures the excellent adhesion of the cataphoretic paint to the surface and the best protective barrier.

The next step is thorough washing of the items in demineralised water and achieving conductivity under 30 µS. It is followed by coating the items. The parameters of lacquer coating must be set appropriately. The process then continues with paint ultrafiltration while washing and blowing off water condensate afterwards.

Another very important subprocess of electrocoating is polymerisation, i.e. cross-linking of the paint by means of heating of the previously coated elements, due to which the hardened paint creates a uniform and aesthetic coating. The time and temperature of heating of each element is adjusted accordingly to the material the item is made of. Once the polymerisation subprocess has finished, the items are left to cool down. The last part of the process is final inspection of the items and packing them according to the customer’s requirements.

Maximum dimensions of feedstock in bath:
- length - 3100 mm, width - 850 mm, height - 1500 mm.

We paint for:

  • BMW
  • FORD
  • OPEL
  • FIAT
  • TRW
  • Valmet Automotive
  • inni

We cooperate with:

  • SOME
  • DIF
  • HMT
  • BASF Coatings AG

Contact details:


"de facto"

Kaczory ul. Rzemieślnicza 9 - 11

63 - 430 ODOLANÓW

Tel : +48 62 733 14 95

Fax: +48 62 733 30 42

E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.