CED problems: Dirt in coating; Electrophoretic coating too thin
A discussion started in 2007 but continuing through 2019
Dirt in Coating2007
Q. We are facing dirt/impurities problem on parts after CED coating.Kalidas Suryawanshi
- Pune, India
? Hello, cousin Kalidas. if you can give us some info, I think our readers can help! Send some pictures, and tell us what you can. If you lack sufficient data, the paint vendor, system vendor, or an e-coating consultant may be able to help. Good luck!
Ted Mooney, P.E.
finishing.com - Pine Beach, New Jersey
Striving to live Aloha
A. Dirt can come due to improper cleaning in the pre treatment line. It can be due to dirt in the E-coat tank. It could be due to dirt in the rinse tanks after E-coat. It could be due to dirt being blown around in the oven with the forced circulation. It could be because of one or more than one of the reasons above. And the reasons above could also be due to improper housekeeping or ingress of dirt and dust in your E-coat shop.
Test each and eliminate. I assure you this does not require NASA technology.
Mohali, Punjab, India
January 14, 2018
A. Check for sludge material in phosphate bath ... if it is high, then desludge it immediately. This will solve your problem.
- Ludhiana, punjab, India
Ra value of CED coatingMay 20, 2009
Q. PLEASE TELL ME HOW TO CHECK THE Ra VALUE OF CED COATING.
WHAT IS THE RANGE FOR OEM VEHICLES?
WHAT ARE/IS THE INSTRUMENT USED FOR CHECKING RA VALUE?
ENGINEER - INDIA
June 2, 2009
A. Ra is checked by roughness gauge.
Better you ask your paint supplier for Ra Parameters.
- DELHI, INDIA
July 23, 2009
Normally Ra value can be checked with use of Perthometer. try it.
- Chennai, India