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Etchant for Revealing Flowlines of Aluminum

What is the procedure and the etchants to reveal the flowlines of a cold forged aluminum component?

Thanks...

Canderim ONDER
R&D Engineer - Sternenfels, Germany
May 7, 2008

For macroetching of aluminum alloys, use Tucker's reagent (45 ml HCl, 15ml HF, 15 ml HNO3, 25 ml Water). This is very strong acid mixture. Use under hood and take all safety precautions.

Kai Lorcharoensery
- Warsaw, IN, USA
June 13, 2008

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