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Aluminum 2000 & 3000 series 1

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Bobchan

Mechanical
Jun 26, 2003
1
HK
Hello,

I'm having problems etching an Aluminum 2000 & 3000 series. I've tried the Keller's and 10% phosphoric acid, but none have worked so far.
My objective is to see the grains by a digital mircoscope.

Do you have any other suggestions I could try?
 
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