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Electro Polishing Services
Electro Polishing Services
Electro Polishing Services is a process by which metal is removed from a work piece by passage of electric current while the work is submerged in a specially designed solution. The process is essentially the reverse of electroplating. In a plating system, metal ions are deposited from the solution onto the work piece; in an electro polishing system, the work piece itself is dissolved, adding metal ions to the solution.
Benefits of electro polishing:
- Brightening
- Burr removal
- Total passivation
- Oxide and tarnish removal
- Reduction in surface profile
- Removal of surface occlusions
- Corrosion resistance
- Increased ratio of chromium to iron
- Improved adhesion in subsequent plating
- Reduced buffing and grinding costs
- Removal of directional lines
- Reduced surface friction
- Stress relieved surface
- Removal of hydrogen
- Electro polishing produces the most spectacular results on 300 series stainless steels
- The resulting finish often appears bright, shiny, and comparable to the mirror finishes of "bright chrome" automotive parts
- On 400 series stainless steels, the cosmetic appearance of the parts is less spectacular, but deburring, cleaning, and passivation are comparable
- Electro polishing is attained in a sequence of wet processing steps using particularly designed tanks, similar to electroplating or anodizing. The parts, which have to be polished, are mounted on a rack or jig, which is moved from tank to tank.
