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Introduction to Electropolishing

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Setup of your new electropolishing line can be achieved using the same equipment typically used in electroplating processes:

  • An acid proof tank,
  • A DC power source,
  • A conductive rack for hanging and dipping work pieces
  • Rinse stations.

Electropolishing process

Polishing begins once the metal is submerged in a solution tank containing a cathode, and charge is applied. Use dedicated cathode plates of suitable material to ensure the current is effective. For more information please refer to the Getting Started: Electro-Glo technical data bulletin.

Fine medical, electronic and other complex electropolished parts may require development by the user and changes to the fixture, design and cathode placement of your electropolishing station.

With proper setup and operator experience, irregular shapes and interior structures including tubing, deep drawn, and spun parts can be polished to a high degree of accuracy.

Electropolishing large and irregular shaped objects

Electropolish and passivation of large tank interiors can be achieved with less solution quantities by laying tank on its side, adding as much solution as practical, polishing, and rotating repeatedly.

A custom-made cathode may be required to accommodate the tanks particular size while the tank is made anodic.

If solution is heated during polishing each polishing section may be completed in a matter of minutes.

Extending the longevity of your electropolishing line

Electro-Glo products are full-to-partial sludging, which contributes to their long life. Replenishment should only be required due to depletion caused by drag-out.

Regular removal of settled sludge and some solution is recommended to keep the electropolishing working at its full potential.

To remove sludge:

  • Transfer tank contents to a temporary holding tank
  • Take care not to disturb the settled sludge during the transfer process
  • Scrape out and properly dispose of sludge
  • Clean cathodes, replace original solution and add new solution as needed.