OT Tornesch



Since the natural oxide layer of aluminium cannot withstand all corrosion loads, it may be necessary to reinforce it artificially by a multiple of between 50 to 5000. This is done by the electrochemical process of anodisation (also known as the anodising process). The oxide layers produced in this way offer high resistance to abrasion, wear and corrosion.


Chromating is a process in electroplating that acts as an independent protection against corrosion and as a primer for metals. It is an electroless, chemical surface treatment with solutions made of chromium salts. Chromate coatings provide low electrical contact resistance. and are usually more favourable than the electrical resistance of untreated parts.

Stainless steel
and stainless steel passivation

Pickling removes a thin layer metallic layer from the steel surface. A mixture of nitric and hydrofluoric acid is usually used to pickle stainless steel. Pickling aims to remove tarnish from welded constructions, in an area where the chrome content of the steel surface is reduced.

Electrolytic polishing /electrolytic

Electropolishing can be used to produce smooth, shiny surfaces on metallic substrates. Electropolished surfaces have a highly aesthetic appearance, which visually enhances the part. This surface meets the highest quality standards.