"Joe" wrote in message
oups.com...
Again, here in this marina the average voltage in the water is .5
volts DC.
If your marina is of any age the discarded metal in the water can
create stray voltage.

Joe


You people and your dumb metal boats, the problems you cause. To make a
battery one needs two dissimilar metals and salt water. You have that in
abundance in a marina what with aluminum hulls, steel hulls, various
zincs, bronze fittings, stainless steel fittings, copper paint, etc.
Steel boats are a menace because steel acts as a cathode so you have to
have all these sacrificial anodes (zincs) attached to protect it from
slowly being eaten away and plated on more noble metals.

Would you allow somebody to pull into the slip next to you and commence
to start sandblasting your hull? I doubt it, but that's about what is
happening to your boat's bottom and sundry metal fittings when a steel
boat parks its ugly ass next to your superior and inert fiberglass boat.
Marinas should be required by law to install active cathodic protection
and all metal boats should pay enough more for their slips to pay for
the costs associated with the protection.

Wilbur Hubbard

Wilbur Hubbard wrote:


You people and your dumb metal boats, the problems you cause. To make a
battery one needs two dissimilar metals and salt water. You have that in
abundance in a marina what with aluminum hulls, steel hulls, various
zincs, bronze fittings, stainless steel fittings, copper paint, etc.
Steel boats are a menace because steel acts as a cathode so you have to
have all these sacrificial anodes (zincs) attached to protect it from
slowly being eaten away and plated on more noble metals.

Would you allow somebody to pull into the slip next to you and commence
to start sandblasting your hull? I doubt it, but that's about what is
happening to your boat's bottom and sundry metal fittings when a steel
boat parks its ugly ass next to your superior and inert fiberglass boat.
Marinas should be required by law to install active cathodic protection
and all metal boats should pay enough more for their slips to pay for
the costs associated with the protection.

Wilbur Hubbard

Hi Wilbur,

The steel boats that can cause problems
are the larger ones using impressed
current cathode protection. These guys
create a very strong electric field in
the vicinity of their vessel that can be
very difficult to protect from.

But the ordinary steel hulls (the
smaller guys you see in marinas)
shouldn't cause any more problems than
fiberglass or wooden boats using iron
keels with welded anodes. Which is
really no problems at all.

The biggest danger from other boats in a
marina is when they are un- or
under-protected and use shore power. But
even that can be easily dealt with.

Of all the things to complain about,
Wilbur. ;-)

Chuck

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