finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
topic 2015

Is anodizing or chromate conversion coating better under powder coating


(1998)

I am trying to find answers to the following questions:

  1. Is the adhesion of powder coatings on aluminum improved by anodize or Alodine treatment before coating?
  2. If there is an improvement, is there a significant difference between the two treatments?

I also would like to know, in simple terms, what the difference is between anodize and Alodine.

Can any of your readers help?

Marshall Davidson
- Meriden Connecticut


(1998)

Alodine is a brand name for a process which is generically called chromate conversion coating. These coatings are electrically conductive and corrosion resistant but with almost no abrasion resistance.

Anodize is an electrochemical process which converts the surface aluminum into aluminum oxide. It is non-conductive with significant corrosion and abrasion resistance.

Both coatings are widely used as adhesion promoters. However, some post treatments can cause adhesion problems. Make sure your finisher knows the final application. Generally, chromate conversion coatings are less expensive than anodize, while anodizing offers better protection.

Chris Jurey, Past-President IHAA
Luke Engineering & Mfg. Co. Inc.
supporting advertiser
Wadsworth, Ohio

luke engineering banner


July 13, 2009

what is the different between aluminum anodized and aluminum powder coated

hosam m
guest - k.s.a.


July 13, 2009

Hi, Hosam. Anodizing has been described; if the description leaves you with any questions, please let us know.

Powder coating is very similar to painting in final results and appearance. Rather than the solids of the paint being dissolved into water or solvent, the solids are supplied as a powder. The powder particles are sprayed onto the part, and electrostatic attraction keeps them there. Then the part goes into an oven where the powder melts and fuses into a continuous thin sheet.

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 Q or A 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.