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Chemical Removal of Brass Plating
Is there any chemical way to remove brass plating? I need to reveal the stainless steel underneath.
Thank you.Cory Allers
- Edmonton, Alberta, Canada
The old traditional is 90 g/l of NaCN with 15 g/l of NaOH @ room temperature. Make the work anodic and use steel cathodes. Although the handbooks all say 6 volts, start out easy at 2 volts.
Another alternate is ammonium persulfate 75 g/l with 375 ml/l of aqua ammonia at 70-85 deg. F with no current. Many proprietaries are also available.Charles Reichert CEF-2
- Seattle, Washington
If the base is stainless steel then the simplest is nitric acid say 20-50% vol or say 10% sulphuric acid with additions of hydrogen peroxide preferably with a stabilizer e.g., phenol, alcohol.
- Port Melbourne, Australia