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Copper/rust color problem when anodizing 60xx

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SUGGESTED ANODIZING & CHROMATING BOOKS
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"Aluminum How-To" -- Chromating, Anodizing, Hardcoating by Robert Probert (2005)
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"The Metallurgy of Anodizing Aluminum" by Jude Mary Runge (2018)
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"The Surface Treatment & Finishing of Aluminium and Its Alloys" by Wernick, Pinner & Sheasby (1959 - 2001)
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"Surface Treatment and Finishing of Aluminum" by Robert King (1988)
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"Anodic Oxidation of Aluminum and Its Alloys" by V. F. Henley (1982)
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"The Technology of Anodizing Aluminum" by Brace (1979)
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"Aluminum Finishes Process Manual" by Reynolds Aluminum (1973)
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"The Anodic Oxidation of Aluminum" by A. Jenny (1940)
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"Anodizing and Coloring of Aluminum Alloys" by S. Kawai (2002, VERY RARELY avail)
from eBay, AbeBooks, or Amazon

Q. Hello all,
I have a problem when anodizing aluminium 60xx series. ASF 12, time 75 minutes, temperature 14C. Someone had the same problem?
With aluminium 20xx series no problems.

Anatolii Khomiak
- Lviv, Ukraine
February 16, 2024

? Hi Anatolii,
Is this a component which has been dyed a copper color but has white patches, or are you saying that this was supposed to be a clear anodized part which turned rust color?
Luck & Regards,


Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

Q. Hi Ted,
Yes, the problem is white patches :(

Anatolii Khomiak [returning]
- Lviv, Ukraine
February 16, 2024

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