HOME FAQs BOOKS JOBS: Help Wanted Suggestions you are here: Hotline/Forum => Letter 24122

Anodized aluminum window frames are acid stained

+++

We cleaned a brick veneer on a building and despite our best efforts to protect the anodized alum. window frames, our cleaners (hydrofluoric based) bled behind our protection and have discolored the brown anodized alum.with purple to brown streaks.
No pitting is visible. We applied liquid silicone to the alum which seemed to fix (or maybe cover up) the staining.

I would like to know of any other solutions short of removing the window frames and replacing. (we have used this cleaner and process many times over our 15 year history and have not encountered this problem before.)

PLEASE HELP IF YOU CAN.

Thanking you in advance!

David Frink
- Dallas, Texas

+++

I am an anodizer myself and I found your question more informative than inquisitive. You've just found a solution to a problem some of us couldn't.

Asyong
- Toronto, Ontario, Canada

ANSWER or FOLLOW UP POST an unrelated QUESTION HOT Topics

Disclaimer: It is 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; some names may be fictitious and some recommendations may be deliberately harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: