Appears the galvanic corrosion of a wooden hull comes from the nails, bolts,
screws holding the wood on to the subframe.

"JAXAshby" wrote in message
...
zincs will help protect submerged wood on a boat. It is
subject to some galvanic corrosion also.

really? wood becomes the anode or the cathode? I guess I have never seen
a
battery with wooden plates before.