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

-----

Discoloration on clear coat anodizing after shelving a while

I have some aluminum parts that were clear coat anodized and been on te shelf for awhile. They now appear to have a yellowish cast to them. Is this normal?

Scott Brown
inspector - Tucson, Arizona, USA
April 16, 2008

It depends!
How long were they on the shelf?
What is the atmosphere of the storage?
Were they chromate sealed?
Were they put up the slightest bit damp?
Are they OK? that depends on your criteria. The anodizer is off of the hook once you accepted them, but it is worth having a conversation with them as to what they think might be the cause.

James Watts
- Navarre, Florida
April 21, 2008

No, not normal. Probably not sealed. Heat could cause the same thing. Acid fumes?

Robert H Probert
Robert H Probert Technical Services

Garner, North Carolina

April 21, 2008

(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: