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Pretreatment for CED coating

I want to know simply explain the phosphating reaction (what is free acid, total acid, coating reaction, sludge formation, sludge recovery, trouble shooting, defects, & CED coating reaction.

Kaliyappan Balamurugan
Ced coating plant - Chennai, Tamilnadu, India
January 5, 2011

Hi, Kaliyappan. Two books that cover phosphating well include Preparation of Metal for Painting ⇦[this on Amazon affil links] and "Phosphating of Metals" by Rausch ⇦[this on Amazon or AbeBooks affil links]. A good electrocoating book should be Electrocoating: A Guidebook for Finishers [on Amazon affil links]. Our readers can probably answer highly specific questions for you. Good luck.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.
January 7, 2011

If you use a reputable proprietary solution vendor, their tech services can give you answers to all of your items except the CED reaction.
If you are going to use a home brew, it very probably will not work as well and you have no one to help when you have problems.

James Watts
- Navarre, Florida
January 11, 2011

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