-- The Home Page of the Finishing Industry
23+ years of serious education, promoting Aloha,
& the most fun you can have in metal finishing smiley
    no popups, no spam
on this site
current topics
topic 6785

Black anodized aluminum becomes white and chalky, any alternatives?



I work for a company that makes parts for the marine industry. We black anodize some parts of our product. The parts anodized is 6061-T6 aluminum. Sometimes the product is exposed to water with gas and oil in it and the black bleaches and becomes a white and chalky within a year. Is there a different finish to use that will negate this problem? We already tried powder coating, but don't like it because it chips. Anodizing is what we have always done and we are not very knowledgable about other processes. Please offer any suggestions.

Thanks very much,

Phil Cone
- Honeybrook, Pennsylvania USA


Try 2-step black anodizing. It holds the dye much longer, and will stand up to elements, such as the newer autoclaving solutions. best of luck.

Pete Faxon
- Oxnard, California

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 Comment 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, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.