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Phosphatizing of aluminum

I am actually using an iron phosphate on iron pieces, Can I use the same solution for aluminum? If I can use this solution what additive ( salt,etc) can I mix it? Thanks a lot for your answer.

Robert Sanchez
- Monterrey, N.L, MÈxico

Hi, Robert. Here in the USA virtually no shop formulates their own phosphatizing solutions; they all buy proprietaries. We don't like to print formulations here, only references to published literature. But phosphatizing solutions can be formulated to handle both steel and aluminum; they are called 'mixed metal' baths if you want to use that term to research it further. Good luck.

Ted Mooney, P.E.
Striving to live Aloha
(Ted can offer longterm or instant help)
finishing.com - Pine Beach, New Jersey

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