Etching fluid for annealed brass

2003

Hello, Please Help.

I'm a student studying materials I need to know what Etching Fluid is used on Annealed BRASS. If anyone could answer this question I would be extremely grateful.

Thanks Regards,

Amelia Washer
- Haywards Heath, West Sussex, England

If by etching you mean making patterns in the brass, the most common solution is FeCl3 (35%), closely followed by CuCl2. Both work at elevated temperatures, say 40-50C. If, however, you want to etch brass for metallurgical examination, use a mixture of H2O2 and NH4OH. Formulations can be found in any good metallography book as the best combination will depend on the brass composition.

Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK
2003

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