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-----Mechanism of a cationic electrodeposition paint system
2004
Problem 1. Need specific information regarding the mechanism of function of the anodes in a cationic electrodeposition paint system. Problem 2. Of the reactions I have seen thus far on my search through the internet on the coating process I do not see where the formation of acid in any steps.
My information shows that there are two major reactions:
1. H(2)O + 2e- -> H(2) gas + 2OH-
2. R-NH(3)+ + OH- -> R-NH(2) + H(2)O
I see no formation of acid into the E-coat bath. Are the formulas incorrect?
Anyone with more detailed information about the mechanism of a cationic electrodeposition paint system including the function of the anodes and anolyte please send me this info.
The anolyte is non-acetic acid
⇦ on
eBay
or
Amazon [affil link] . It is a recirculating DI system that purges once a certain conductivity is reached.
Paint Line Technician - Georgetown, IL, USA
Look at www.clearclad.com/clearclad_resources/ecoat.htm. This gives a good explanation as to how e-coats work.
Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK
2004
Dear Jeff:
The acid is generated at the anode. The reaction is: 2H20 ->
4H+ + O2 + 4e- Hope this helps.
Regards.
Mohali, Punjab, India
2004
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