[TowerTalk] screw anchors

[Pat Barthelow]

Pete, N4ZR Said:
>It's probably worth pointing out that ANY anchor scheme that relies on 
>galvanized steel hardware below ground is exposed to the same potential for 
>galvanic action; some pretty serious tower people around here make it a 
>practice to coat any galvanized hardware that will be below ground with 
>asphalt roofing cement before installing it.
>
>73, Pete N4ZR

Thanks for that info Pete.   I wonder if there is a problem with coating the 
undergroud portion, if you do not have a PERFECT insulative seal with the 
coating, if the very small, say, pinhole that remains exposed, causes a high 
density of galvanic current, attacking the metal at a point location, that 
will hasten the erosion at a single point, compared to a large area of steel 
that might be attackeed more gradually.
73, de Pat AA6EG  aa6eg at hotmail.com