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Electropolishing 17/7 PH Stainless Steel


Q. Hi,

We make small metal rings (like key rings) which are about 1/2 inch in diameter. They are made from "17/7 PH Condition A" Stainless steel wire (for the added strength and corrosion resistance). We've tried polishing these rings in a vibratory polisher but the insides of the rings do not get sufficiently polished in this manner. I've heard that electropolishing may be a good alternative and provide added corrosion resistance? Does this sound right? Any advice or other suggestions would be greatly appreciated.


Joe Trattner
- North Aurora, Illinois, US


A. We are having a 17-7 PH wire clip electropolished and it works superbly. We are using a rack method which is extremely repeatable on dimensional control.

Jim Caroll
- Novi, Michigan

The Electrolytic and Chemical Polishing of Metals in Research and Industry
by W.J. Tegart
from Abe Books

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August 22, 2013

Q. We have an issue with some parts we had electropolished. 10% of the lot seemed to have areas of the spring that have not been electropolished. The vendor has tried to electropolish the surface multiple times but came up unsuccessful. My question is what in the vendor's process can create this type of issue?

Chris K
- Schiller Park, Illinois

September 24, 2013

A. I'm not an electropolishing guy at all, but my limited understanding is that part geometry can have a large effect on the current flow and therefore bias the EP to some areas and away from other areas of the part. I think this is usually addressed by shaping the electrodes in a way that accounts for the part geometry.

ray kremer
Ray Kremer
Stellar Solutions, Inc.
supporting advertiser
McHenry, Illinois
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September 25, 2013


17/7 is perfectly electropolished in Universal Electrolyte. The results are 100 guaranteed. Contact us for more information

Anna Berkovich
Russamer Lab
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Pittsburgh, Pennsylvania
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