No passwords, No popups, No cost, No AI:
we earn from 'affiliate link' purchases, making the site possible

Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing since 1989

-----

Chromate Conversion Coatings

Dear Mr. Mooney,

I refer to your interesting response to the thread no. 13031, in which you say that, as regards the thickness of the anodized oxide layer, half of it replaces the consumed metal, half increases the global thickness.

My question is: does the same happen in chromate conversion coatings (Alodine)?

Best regards,

P. Cirese
- Italy

Chem film forms a gel coating on the outside of the aluminum. Most of any loss will be from the preparation steps. If mild cleaners and etches are used, you will not be able to measure the loss with normal equipment.

James Watts
- Navarre, Florida

No. Chromates are complicated coatings consisting of various oxides, hydrated compounds, etc. I do not know how much aluminum is removed in the chromating process, but it's a very small amount.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully 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 might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: