No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

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

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

BLACK ANODIZED PROBLEM

I HAVE A SET OF BLACK ANODIZED TRUCK BEDRAILS THAT ARE TURNING PURPLE IN COLOR,WHAT IS CAUSING THIS PROBLEM?

ALBERT PACHECO
- ACUSHNET, MASSACHUSETTS, USA
2003

Could be numerous things...poor sealing of the coating would be the #1 suspect. Inadequate coating thickness.... using a dye with poor lightfastness. Its almost impossible to tell without physically testing the rails.

Marc Green
anodizer - Boise, Idaho
2003

Is there a smut that rubs off when parts are dry? If so cut your anodize time by 15 min your parts may be burning in the anodize tank. This is also common on 2000 series substrates.

Casey Weizel, President
Foresight Finishing LLC

- Tempe, Arizona

2003

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

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: