<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div><span>I have used aluminum on galvanized for years, I have not had a problem. I reciently went to repair a system that I installed 20 years ago, and it was fine. If you have salt air run, but I have not had any problems.</span></div><div><span>Darryl</span></div><div><span></span> </div><div><span></span> </div><div><span></span> </div><div><span></span> </div><div><br></div><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt;"><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"><font size="2" face="Arial"><div style="margin: 5px 0px; padding: 0px; border: 1px solid rgb(204, 204, 204); height: 0px; line-height: 0; font-size: 0px;" class="hr" contentEditable="false" readonly="true"></div><b><span style="font-weight: bold;">From:</span></b> Jeff Yago
<jryago@dtisolar.com><br><b><span style="font-weight: bold;">To:</span></b> 'RE-wrenches' <re-wrenches@lists.re-wrenches.org><br><b><span style="font-weight: bold;">Sent:</span></b> Wednesday, October 5, 2011 11:23 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [RE-wrenches] mixing aluminum and galvanized steel<br></font><br><div id="yiv94539935"><style><!--
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--></style><div><div class="yiv94539935WordSection1"><div class="yiv94539935MsoNormal">For years we have used standard mounting racks like UniRac rails bolted together with stainless-steel hardware. On larger arrays this usually means bolting their extruded aluminum module rails to galvanized 3” pipe supports for ground mounted arrays.</div><div class="yiv94539935MsoNormal"> </div><div class="yiv94539935MsoNormal">We have recently received several “flags” during the engineering review process of our design documents on state funded projects stating all bolted connections between aluminum and galvanized steel will require neoprene washers to prevent corrosion.</div><div class="yiv94539935MsoNormal"> </div><div class="yiv94539935MsoNormal">Any of you run into this requirement or have had any problems? The only issues we ever see with corrosion is mixing copper and aluminum such as where somebody used wrong type module frame
ground connectors.</div><div class="yiv94539935MsoNormal"> </div><div class="yiv94539935MsoNormal">Jeff Yago</div></div></div></div><br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" ymailto="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules & etiquette:<br>www.re-wrenches.org/etiquette.htm<br><br>Check out participant bios:<br>www.members.re-wrenches.org<br><br><br><br></div></div></div></body></html>