Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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

The authoritative public forum
for Metal Finishing since 1989
-----

Corrosion Between a Black Anodized Aluminum Part and a Yellow Zinc Plated Part

Is there any potential for corrosion building up when a black anodized aluminum plate is attached with steel bolts and nuts to a yellow zinc plated steel surface?

Dieter Eberhard PMP
Project Manager - Arlington, Texas, USA
September 24, 2008

Hi, Dieter. What finish is on the steel nuts and bolts? Presumably zinc plating and clear chromating?

Zinc plating and aluminum anodizing are somewhat close in electrochemical potential -- but everything is relative. For an aircraft it's a no-go; for interior use it sounds fine; for exterior use the zinc plating probably won't last that long anyway.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
September 26, 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: