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

-----

Alkaline runoff stripping anodized finishes

Why does Alkaline runoff produced from new concrete strip the anodized coating off of aluminum? We are using 6063-T6 aluminum with a 210-R1 .0002 mill coating. Is washing the runoff off the aluminum the only method of prevention?

Richard Thorne
Crawford Tracey Corporation - Jacksonville, Florida, United States
2003

Anodized coatings are aluminum oxide, which is soluble in alkali. Keeping the run off away is better than washing it off, but yes, the runoff will definitely attack the anodized coating.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.
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: