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Metal finishing Q&As since 1989
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How to preserve a raw aluminum finish
I'm working on some aluminum costume jewelry that I soak in strong sodium hydroxide solution for a few minutes outside. The result is a sandy, non-reflective white surface that I really like. I want to preserve this surface, and prevent it from being scratched or polished from everyday wear. Any ideas? Regards, Joe.
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Joe Davisson
St. Louis, Missouri
1999
1999
Just try anodize the aluminum. connect the aluminum to the anode and the cathode can be lead, aluminum or graphite.
V ~ 12 VDC, Amp
5 A/dm^2,
Temp ~ 25C,
electrolyte ~ 10% vol. H2SO4,
electrode distance ~ 10 cm,
time ~ 5 to 60 min. Try to vary the above variables.
- Hong Kong
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