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).

thanks again for the help.

"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

purple_stars wrote:
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 ?

They must be outside the hull.

and .. do they have to be submerged in seawater
or do they work in the air ?

They must be submerged in seawater and will not work otherwise.

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).

They do not have to be physically attached, but their range of effective
protection will generally be greater if they are. Hanging the anodes is
not a particularly attractive solution if/when the vessel is in motion,
obviously.


thanks again for the help.

Keep in mind that the hull and the zinc anode form a galvanic couple
only when both are immersed in seawater and connected electrically, and
that the ability of the anode to protect the steel will depend, among
other things, on the zinc's surface area and the distance between the
zinc and the steel surfaces. And, of course, no paint on the zinc!

Good luck,

Chuck

Purple,

Check out the forum at www.metalboatsociety.com. You will find a topic
related soley to zincs.

More, MUCH more, than you ever thought you could know on the topic is
available.

Howard

purple_stars wrote:
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).

thanks again for the help.