"purple_stars" wrote in message
ups.com...
hi folks, quick question ...

i've been reading a lot about sacrificial zincs for protecting
steel
hulls and i haven't been able to figure out from my reading
where they
are mounted. my reading material says how they are mounted,
like
welding, or hanging on metal wires, etc, and it says where they
are
mounted in relation to each other ... that is, certain distance
apart
to protect such-and-such square feet of hull, etc ... but i have
more
basic questions like, do they have to be on the outside of the
hull or
can they be inside ? and .. do they have to be submerged in
seawater
or do they work in the air ? i can't tell if you have to weld
them to
the underside of the boat so that they are in the seawater or if
you
can just hang them from a wire inside the boat somewhere in the
air
where they aren't in the way (while being electrically connected
to the
hull of course).

In the sea water, outside the hull. Usually bolted on to studs
welded onto the hull, but also hung by wires from the rail.
--
JimB
http://www.jimbaerselman.f2s.com/sw_peloponese.htm