The state of the surface determines the appearance, function and life of metal parts. Polishing and electrochemical deburring (electro-polishing) improve a whole range of the properties of metal surfaces.
The application of a direct current causes the dissolution of the metal surface on a part connected to the anode pole immersed in a specific electrolyte specific. The dissolution phenomenon is preferably controlled by the micro-irregularities. The surface is graded and becomes shiny, hence we call this electro-polishing.
Metal surfaces having had either electro-chemical or mechanical treatment are fundamentally different. A metal surface subjected to machining, milling, drilling, sanding, polishing, undergoes changes of its original properties. The rise in temperature, the deformation of the workpiece during mechanical treatment causes structural changes, the enlargement of crystals and internal stresses.
In contrast to these techniques, the electro-polishing processes have the effect of removing the surface layers without causing mechanical, thermal or chemical disturbances.
Electro-polished surfaces are:
- Free of impurities and internal stresses
- Levelled and free of micro-fissures
- Chemically passive
- Free from burrs, chips, flakes, particles and gaseous inclusions
- Bright and decorative.
Electro-polished surfaces are remarkable for:
- Improved corrosion resistance and increased life span
- Reduced frictional resistance
- Ease of cleaning, reduced product adhesion and the risk of microbial germination
- Reduced risk of radioactive pollution and improved decontamination capability
- Decreased catalytic surface reactions
- Ease of surface degassing in ultrahigh vacuum facilities
- Improved electro-deposition conditions
- Ease of welding
- Optimal reflectivity
- Ease of control due to the removal of disrupted layers and the exposure of machining and manufacturing defects.