Metals that Can Be Electropolished
See Photos of ElectropolishingElectropolishing User's Guide
Most metals can be electropolished successfully, but the best results are obtained with metals with fine grain boundaries that are free of non-metallic inclusions and seams. Those metals having a high content of silicon, lead or sulfur are usually troublesome.
Stainless steel electropolishing the most frequent alloy electropolished, and all alloys can be processed. Castings will polish to a bright finish but not to the same brightness or smoothness produced by wrought alloys.
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.
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