i have seen fast corrosion of copper on galvanized....
So as long as we're speculating, how about bare copper grounding conductors
in EMT, is the coating on/inside conduit simply your
common molten zink plating or does it contain a nickle or some other alloy
to inhibit the eventual copper corrosion? Zincs anodic
rating is down there with aluminum on the scale.
Jim Duncan
North Texas Renewable Energy Inc
817.917.0527
nt...@earthlink.net
www.ntrei.com
Hi Wrenches,
I'm wondering what types of experiences you folks have
with galvanic
corrosion. As we all know, racking and ground systems
commonly use copper,
aluminum, steel, etc. which may or may not be compatible
with each other.
There's the theory:
http://www.engineersedge.com/galvanic_capatability.htm
and then there's real life experience.
I have first hand experience with aluminum lay in lugs used
to bond modules
corroding and turning to powder. We all know to use tin
coated copper lugs
for module and racking grounding. However, I see bare
copper ground wires
run over all sorts of different metals and I wonder what
issues might pop up
in the long haul.
How well does bare copper hold up when it is touching
anodized aluminum?
What about copper and hot dipped strut? How do you run bare
ground wire when
you're connecting multiple arrays separated from each
other? Has anyone seen
issues arising between steel and aluminum racking parts?
I'm looking forward to seeing what types of field
experiences you have seen.
Best,
August
August Goers
Luminalt Energy Corporation
O: 415.564.7652
M: 415.559.1525
F: 650.244.9167
www.luminalt.com
aug...@luminalt.com
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