Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

Color variations in aluminum anodizing

Q. I am working as a production engineer in aluminum industry. We are facing problems in color variation as we are checking it twice a day in lab. What are the basic parameters required and how can we improve this?
As temperature of our bath is about 25-28° C and 15 volts is used for a time period of 1 minute ten seconds to 1 minute forty seconds for light champagne to dark brown colors respectively.

Muhammad Sabir
- Lahore, Pakistan
June 12, 2012

A. Hi Muhammad.

Your situation isn't clear to me. If the champagne to dark brown color is being imparted by the anodizing bath itself rather than by a dye or a two-step anodizing process, as you seem to be implying, then what is your process? Is this oxalic acid anodizing or integral color anodizing?

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
June 12, 2012

(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: