Difficulty in electroetching of 1050 aluminum alloy

AI Thread Summary
Electroetching 1050 aluminum alloy using a solution of 5ml phosphoric acid and 95ml water at 1 to 10 volts resulted in failure after 6 minutes. Key points of discussion include the need for clarification on what "failure" entails, the suggestion to consider using sodium hydroxide (NaOH) instead, and the importance of the oxide layer's thickness. Participants also inquired about the presence of bubbles during the process and the correct polarity of the setup, indicating these factors could influence the effectiveness of electroetching. Overall, the conversation emphasizes troubleshooting methods and alternative solutions for successful aluminum electroetching.
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Dear friends
I have tried to electroetch 1050 aluminum alloy by 5ml phosphoric acid + 95ml H2o under 1 to 10 volts. However, it was a complete failure even after etching for 6 min.

Please help me if you know how to overcome this problem.

Thank you very much
Best regards
 
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What does failure mean?
All you wish to do is electroetching aluminum?
Why not NaOH
Is the oxide layer thin? I usually get at least electrolysis and some etching with tap water. Are any bubbles coming out?
Are you sure you used the right polarity?

A few startup questions.
 
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