Powder coating over e-coated surfaces
Any suggestions/advice for powder coating over a new steel frame after it has been e-coated? I have a 5 stage wash, alkaline - rinse - phosphoric - rinse - RO rinse, and my chemical rep is advising running only the 4th and 5th stage.David Simon
- Cascade, Iowa
Presuming you get those parts supplied e-coated by others, I would go for 1-2-5, thus removing dirt, finger stains, oil/grease etc. Test one part first; not all E-coat - powder combinations supply enough adhesion. Also outgassing problems are known, especially when the e-coat was cured at too low temp's.
- Enschede, The Netherlands
April 29, 2009
Hi, David. Obviously, the ideal situation would be to go directly from e-coating to powder coating. But I believe that Remmelt is correct that you are likely to have fingerprints and other soils which much be removed before powder coating. Good luck.
Ted Mooney, P.E.
finishing.com - Pine Beach, New Jersey
Striving to live Aloha