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Suitable surfactant for iron phosphate

I want to know some suitable surfactant in iron phosphate(cleaner and coater).
I have tried few but they don't thoroughly mix and take place on upper surface of the product.

Sajjad Bashir
metal care chemicals, Manufacturers of surface treatment chemicals,like degreasing and phosphating chemicals - Lahore, Pakistan
2006

Metal finishing processes are usually performed with proprietary chemicals, Sajjad, and I think it's unlikely that people who have spent years of research to develop saleble proprietary processes will cheat their investors by sharing specific formulas with their competitors. But searching through expired patents or reviewing such texts as Samuel Spring's Preparation of Metal for Painting ⇦[this on Amazon affil links] or "Phosphating of Metals" ⇦[this on Amazon or AbeBooks affil links] by Rausch should get you started. Good luck.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2006

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