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Copper/rust color problem when anodizing 60xx

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RECOMMENDED ANODIZING & CHROMATING BOOKS
for Shops, Specifiers & Engineers

"The Surface Treatment & Finishing of Aluminium and Its Alloys" by Wernick, Pinner & Sheasby (1959 - 2001)
avail from eBay, AbeBooks, or Amazon

"The Metallurgy of Anodizing Aluminum" by Jude Mary Runge (2018)
avail from eBay, AbeBooks, or Amazon

"Surface Treatment and Finishing of Aluminum" by Robert King (1988)
avail from eBay, AbeBooks, or Amazon

"Anodic Oxidation of Aluminum and Its Alloys" by V. F. Henley (1982)
avail from eBay, AbeBooks, or Amazon

"Aluminum Finishes Process Manual" by Reynolds Aluminum (1973)
avail from eBay, AbeBooks or Amazon

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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.

61639-1

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_yosem
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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