Electropolishing is the inverse of electroplating. In electropolishing and electrical current is carried through the parts being polished and out into a conductive electropolishing solution. This process carries individual atoms of the material away from the surface and because of the way current density works it tends to have more of an effect on any sharp corners the parts might have. Electropolished parts can be made beautifully shiny and burr free. Many surgical tools are electropolished as a final manufacturing step to make sure all the edges are smooth.
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