| Search our quarter-million Q&As |
Home of the finishing HOTLINE since 1989
-----Pretreatment for painting of aluminum flat sheet
January 10, 2010
We are production company producing print finishing equipment.
Recently we decided to change steel frame to aluminum sheet 3/8 x 6. At the present time we have a problem with paining. We know that aluminum should be anodized before painting,but is there any way to paint aluminum without pretreatment ?
Thank you .
ERSO
production - Toronto, On, Canada
January 11, 2010
Hi, Aleksandr. It is not true that the aluminum should be anodized. Rather, it should be chromate conversion coated. Next best would be phosphatization in a phosphate system designed for mixed metal. It is possible that you can get adequate adhesion with a self-etching primer without doing the conversion coating, adequate for a do-it-yourselfer, but it isn't really the right approach for equipment that will be sold. Good luck.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.
Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.