-- The Home Page of the Finishing Industry
HomeFAQsBooksHelpWantedsForum letter 17776
Serious Education ... plus the most fun you can have in metal finishing.

Aluminum/steel interaction


I am having trouble with aluminum parts running through a machine with a stainless steel hopper and feeding track. Could this be the interaction of the two metals? I tried putting a polymer coat on the aluminum and got good results, so that is how I came to the conclusion.


Joe Giannacco
- Clarkesville, Georgia


You did not say whether there was water (and electrolyte unless 100% distilled) or any other chemical in the hopper.

In any conductive liquid, aluminum and stainless steel produce a galvanic voltage. High school chemistry.

Robert H Probert
Robert H Probert Technical Services

Garner, North Carolina

Editor's note: Mr. Probert is the author of Aluminum How-To / Aluminio El Como


If you can keep moisture out of the copper corrosion is not likely. 400 series ss will react with aluminum. 300 series is much better coupled with aluminum bet will corrode aluminum if moisture and salts are present.

Don Baudrand
Consultant - Poulsbo, Washington

(Don is co-author of the
book "Plating on Plastics")

ADD a Q or A to THIS thread START a NEW THREADView This Week's 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 need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2017     -    Privacy Policy
How Google uses data when you visit this site.