Quote:
Originally Posted by FSMike
In wooden vessels it is possible to cause deterioration to the wood in areas such as where through hulls are located. There was an interesting article about this some years ago in (I believe) Wooden Boat magazine.
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Yes, there were some articles in WoodenBoat, ('70s>'80s?,) that were written by Giffy Full, a
surveyor who became quite a legend in the NE.
The up-shot was that underwater
bronze that is electrically isolated does not need any zinc protection and that connecting zincs to
bronze either directly or thru a bonding scheme led to over-protection, which caused de-lignification of the wood surrounding the bronze fitting.
I've observed that several times in the past, the wood gets a white fuzz on it.
The can-of-worms started wiggling when boats started being loaded-up with all kinds of inferior metals and "sketchy" AC/DC electrical systems.
Zincs became a "Band Aid" which, (unknowingly at the time,) contributed to a lot of wooden boats having severe damage.