The Electropolishing process cleans and polishes metal in a special electrochemical solution. An electrical current passes through a chemical bath, dissolving a small amount of smear metal from the surface, leaving a smooth, shiny finish. The current is greatest on the outside edges and corners of parts, which are left especially smooth. Increasing the process time will remove more amount of metal. Holes can be enlarged, threads can be rounded and sharp edges or burrs can be reduced. Electropolishing can be performed on a variety of metals; including stainless steel, brass, aluminum, titanium, copper and other high grade steels. Electropolishing is an excellent finishing process for fine parts because no vibrating or tumbling is involved.

Do to the part being bathed in oxygen, hydrogen is removed from the surface, thereby acting as a stress relieving anneal. In addition, the electropolished surface, being free of hydrogen greatly reduces the possibility of bacterial growth. Electropolishing is the best choice when contamination cannot be tolerated.