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Etchant for cold worked 6000 series Al alloys

I want to know the exact etchant to see the grain boundary of severely cold worked 6000 series Al alloys. Please help me.

Sushanta Ku Panigrahi
Student - India
2006

Hi,
Sorry, I didn't see your query before. Anyway you can use either of these two:
1. 5% HF + 10% H2SO4 + 85% H2O [by swabbing 2-3 minutes at room temp.].

OR
2. 10%H3PO4.

Hope this will help you.

Srimay Basu
- Dubai, U.A.E.
2006

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