Letter 9060

Dissimilar Metals 

+

My questions is concerning corrosion due to contact between two dissimalr metals. I have an extruded alum. tube 6063-T5 and some structural steel tubing. The alum. is painted with a 2-part polyurethane paint. What type of material should be placed between the two dissimilar materials to help prevent electrolytic corrosion? The alum is used as an architectural feature in a commerical building and the steel is needed for structural support.

Any advise would be greatly appreatated.

Rafael Rivero
- Corona, CA

This is a common problem in aerospace where cadmium is used. For commerical work I would suggest galvanising which would also give good corrosion protection.

Martin Trigg
surface treatment shop - Stroud, Glos, England

I want to post a question or inquiry of my own.

 

I want to answer or follow-up on this question publicly (in non-commercial fashion).

 

I am a supporting advertiser and want to reach the inquirer privately.