Electropolishing and passivation

Electropolishing

Electrochemical polishing (electropolishing) and deburring decisively improve the properties of the metallic surfaces, which has a positive effect on the durability of the individual components. Electropolishing is an electrochemical procedure for surface removal at the edge zones of the workpieces. The removal is performed with special water-based solutions using current in micro ranges and produces a smooth and shiny surface.

The modular designed plants and basin systems include several basins for the entire electropolishing process: Pre-treatment (ultrasound), pickling, electropolishing, rinsing and passivation.

Electropolished metallic surfaces are used in different industrial areas, such as medical and laboratory technology, mechanical engineering and tool construction, automotive and vehicle construction, as well as in the chemical, biochemical and pharmaceutical industries.

Suitable metals for electropolishing:

Stainless steel
Titanium alloys
Copper alloys
Carbon steel
CrCo alloys
Aluminium alloys
Magnesium alloys
and other metals

electropolishing and passivating unit Compacta

COMPACTA
electropolishing and passivating

Passivation

During the passivating process, an active, metallic surface is transformed into a surface consisting of a compound. Passivation is used, for example, for stainless steels which form a very stable oxide layer when exposed to oxygen. Passivation provides this oxide layer with a dense and sealed covering layer. This prevents or greatly slows down the corrosion of the base material. The treatment of the workpieces is performed in an immersion process.

For the electropolishing and passivation of stainless steel, Walter Lemmen GmbH offers single tank systems as well as compact electroplating systems which are either manually operable or semi-automatic systems with handling system and PLC control. As a system supplier, the corresponding process chemicals are also offered: Electropolishing electrolytes, pickling solutions and passivation agents.

electropolishing unit with handling system
and SPS control system