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Etching of 3000 series aluminium to reveal grain boundaries
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I am having trouble etching a 3000 series aluminium. Have tried caustic, Tuckers, Kellars, Barkers, dilute and concentrated HF with water. I only have success in revealing the precipitates and cannot resolve the grain boundaries. Can anybody out there help me out?
Matthew HoganMelbourne, Victoria, Australia
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It's better to anodise it .
Kas- Manchester, England