"Ian Malcolm" wrote in message
...
Larry Jaques wrote in
:

So, my kW of solar panels came in. The frames and z-brackets are
aluminum and the hardware (5/16x2-1/2" lags and 1/4-20 bolts) is
304
stainless. I picked up Unistrut to hold it and it has galvanized
nuts. Will there be hell to pay from electrolysis, and, if so, is
there any way to mitigate it? Rubber discs under the washers?

Use original Duralac anticorrosive jointing compound on all
fasteners.
http://www.llewellyn-ryland.co.uk/duralac.html
If you have a large area of other metal in contact with aluminium,
use a
vinyl or mylar tape gasket stuck to the cleaned aluminium surface
and
trimmed to be only fractionally larger than the contact area. If
you use
a loose gasket, you *MUST* use Duralac or similar on the face
touching
the aluminium to prevent poltice corrosion.

That should give you acceptable corrosion resistance even in a
coastal
area, or with high air polllution or within the spray drift zone of
a
major highway thats salted in the winter.

--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
[at]=@, [dash]=- & [dot]=. *Warning* HTML & 32K emails -- NUL

Barium Chromate, its active ingredient, is known to the State of New
Jersey to be toxic and potentially carcinogenic, and they are our
experts on hazardous waste spills. .
http://nj.gov/health/eoh/rtkweb/documents/fs/3074.pdf

--jsw