Metals That Can Be Electropolished

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Electropolishing is used to remove surface materials off of other various materials such as a variety of alloys. There are several advantages and benefits that are associated with electropolishing. When an alloy goes through the electropolishing process, it improves the corrosion resistance, repairs surface finish, makes the material easier to clean, and gives the material a striking finish. Most metals can be electropolished successfully, however the best results are obtained with metals that have fine grain boundaries that are free of non-metallic inclusions and seams, such as electropolished stainless steel. Those metals having a high content of silicon, lead or sulfur are usually troublesome.

Stainless steel electropolishing tends to be the most frequent material polishing process compared to other alloys, however all alloys can be electropolished. The most common stainless steel alloys that can be electropolished include 304, 316 and 316L along with a multitude of other grades. Castings will polish to a bright finish but not to the same brightness or smoothness produced by wrought alloys.

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Most Commonly Electropolished Metals Include:

  • 304 Stainless Steel
  • 316 and 316 L Stainless Steel
  • 400 Series Stainless Steels
  • 17-4 pH
  • MP35N
  • Nitronic 60
  • Elgiloy
  • 2205 Duplex Stainless Steel
  • Other Duplex Stainless Steels


Other Commercially Electropolished Metals Include:

  • Low and High Carbon Steels
  • Tool Steels
  • High Temperature Alloys (Molybdenum, Nimonic, Waspaloy, Tungsten)
  • Aluminum
  • Titanium
  • Copper
  • Kovar
  • Cupronickel
  • Inconel
  • Brass
  • Columbium
  • Bronze
  • Leaded Steel (Low-Lead)
  • Nickel Silver
  • Beryllium
  • Monel
  • Vanadium
  • Hastelloy
  • Tantalum
  • Beryllium Copper
  • Silver and Gold


Many of the above metals can only be electropolished in large production runs and in controlled environments. This is due to the sometimes-costly set-up, tooling and special environmental and safety equipment requirements associated with many of these processes.

Needing electropolishing but don't see the metal listed above? We will help you find the perfect metal finishing process for your application. Contact Delstar Metal Finishing today for all electropolishing questions and the industry's best metal finishing services including passivation, metal pickling and electropolishing.

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