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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
finishing.com - Pine Beach, New Jersey

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