plating, anodizing, & finishing Q&As since 1989
Finishing Stainless Steel After Welding
We are looking for safe and economical methods for finishing Stainless Steel after welding:
1) Removing weld discoloration
2) Regraining #4 Brushed Stainless
We are interested in chemical, electrical, electrochemical and manual methods. Most of our applications are low volume precision sheet metal components used in food or pharmaceutical equipment.Brian Landsman
- Chagrin Falls, Ohio, USA
There are commercial products that should be available through a good welding shop for chemical removal of the oxidation around the weld. These pastes should be safe when handled carefully and supplied with directions and applicable warnings. My guess is that you will have to do some mechanical finishing to restore the original texture.
There is no "easy" way to do all you want to do, primarily the returning of the finish to #4 Brushed Finish. The best system we could recommend is to brush the surface of the welded area to remove the weld discoloration and return the surface to a semblance of the #4 finish with a ss wire brush or rotating brush on a drill or similar, followed by passivation with a proprietary citric acid to make sure the surface of the weld will not rust. Let us know if we can help.
Stellar Solutions, Inc.
Try this combination Nitric - hydrofluoric acid combination. It will take some 5 minutes when you brush the welded part with tooth brush.
- Mumbai, Maharashtra, India
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