I am puzzled by the following assertion:
"...If you live on the seashore and have a moisture/salt/wind condition
continually battering your antenna, you have to be a lot
more selective in your choice of anti-seize, because the moist salt air will,
over time, wash the metal particle suspension
(oftentimes copper) out of the anti-seize compound and replace it with
corrosive salts, leaving the fasteners even more vulnerable
to galling than if no anti-seize had been used in the first place. A
non-metallic anti-seize compound (much harder to find at
retail) is recommended for such environments..."
What is the mechanism by which salt air/water penetrates the suspension, and
converts its contents to a corrosive salt?
I've used ordinary anti-seize compound on racing sailboats and not seen this
at all.
Perhaps this is being confused with galvanic corrosion of aluminum, when
stainless steel hardware is used in a salt water
environment without galvanic isolation? This corrosion pits the aluminum and
generates a white, powdery material (some form of
aluminum). Such galvanic corrosion can be reduced by placing a plastic washer
between the stainless steel hardware (bolt head,
ny-lock nut) and the aluminum surface. One needs to use a form of plastic that
will resist deformation when the bolt is tightened.
-- Eric K3NA
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|