I'm not sure about Aluminium to Cast Iron but I do know that the potential
difference between aluminium and galvanised steel is between 290 & 460. This
usually means that below a potential difference of 500 you need no special
protective measures particularly if the joint is dry. Unfortunately here in
the UK a dry joint does not occur too often so I would suggest you consider
at least painting if not the use of something more sophisticated.
> -----Original Message-----
> From: Ken Peoples [SMTP:kspeoples(--nospam--at)yahoo.com]
> Sent: Monday, June 25, 2001 3:56 AM
> To: seaint(--nospam--at)seaint.org
> Subject: cast iron and aluminum compatiblilty
> I have been asked whether placing new aluminum framing on existing cast
> iron brackets will cause corrosion problems. I don't deal with either
> material very often, but I do recall having to separate aluminum from
> galvanized steel in the past. If I do have to separate them, would
> painting suffice or is something more elaborate required. The aluminum
> framing is bleacher seating for a stadium.
> Thanks for your help.
> Kenneth S. Peoples, P. E.
> Lehigh Valley Technical Associates
> 1584 Weaversville Road
> Northampton, PA 18067-9039
> ph: 610-262-6345
> fax: 610-262-8188
> e-mail: kpeoples(--nospam--at)lvta.net
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