finishing.com -- The Home Page of the Finishing Industry
We've been striving for 23 years to build the
world's best website -- it's worth your time smiley
    no popups, no spam
HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
topic 41055

Powder coating anodized aluminum parts


2006

I have thousands of small black anodized aluminum parts that I wish to powder coat w/o first stripping. Is there any problem w/ compatibility or significantly diminished adhesion?

Chuck DeWitt
electronics - Hamilton, Montana, USA


2006

There is no 100% answer. You can paint over sulfuric anodized parts in most cases. In a few, dye might cause a problem. there are several paints that do not like chromate sealed or chromic acid anodizing. Seal does not make a lot of difference unless the parts are quite old, then sealing helps. Wait a day after anodizing to paint as your powder coat cure temp might cause a lot of water outgassing. I think that unsealed paints better, but I have read several opinions to the contrary. Best is what works for you.

James Watts
- Navarre, Florida


July 31, 2008

Is it possible or is there a specific process to anodize aluminum pre-bend and drilling without molecular failure and eventual flaking off of the finish?

Thomas Babcock
Bozeman, Montana, USA

August 2, 2008

Hi, Thomas. No, I don't think so. Anodizing is a very hard and brittle aluminum oxide ceramic coating. You can't significantly bend it without it badly cracking. If it's going to be bent, chromate conversion coating sounds like a better choice.

Regards,

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2018 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.