Alimunium against galvanize (zinc) is stable, I have been doing this for 40 + years and I have not seen corrosion, I have seen rapid corrosion with copper to galvanize, eating the galvanize up. Also I have seen copper to Aluminium being corrosive, eating on the aluminum. Galvanize is stable and a good electrical conductor, everyone uses it, power compinies and electrical contractors. since 1900! The problem is the aluminum getting a Aluminum oxide coating on it and becoming an insulator. The electrical industry puts a Tin coating on electrical fittings, to protect the connection between copper and galvanized steel.
Bill brooks published a "Tribal electric Series" once, this told what we could expect from metals in contact. Aluminum is close to galvanized, so one would expect little reaction. By way of comparision I removed and reinstalled a system, AL frames on to galvanized Unistruct, first put up in 1980, I reused all teh same parts. Darryl --- On Thu, 12/30/10, Joel Davidson <joel.david...@sbcglobal.net> wrote: > From: Joel Davidson <joel.david...@sbcglobal.net> > Subject: [RE-wrenches] Galvanic corrosion > To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> > Date: Thursday, December 30, 2010, 9:36 AM > Wrenches, > > Galvanic corrosion has been discussed before, but I am > hoping that you all have come up with better, faster, > cheaper ways to fasten and ground aluminum framed modules to > steel and galvanized steel mounting structures. I am > particularly interested in how to effectively and > permanently ground aluminum framed modules to galvanized > steel and - ready for the big challenge - getting the AHJ's > approval. > > Best wishes for another wonderful year of fun in the sun. > Joel Davidson > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
