Each year after fall haul out
, I need to repair damage to my lead keel
resulting from an electrolysis
issue. Last spring, I completely stripped the keel
, repaired the powdery areas with epoxy
filler, applied four coats of barrier coat and finished with 2 coats of fresh bottom paint
. Still the same problem although not as bad as previous years. Last spring I had a marine
electrician look at the AC system and determined the problem was most likely from an incorrectly wired GFCI. I was getting a low voltage reading on the keel when the outlets were switched on. I replaced all three recepticles with new GFCI rewired as a precaution. The entire system is bonded to an aft keel bolt. Still the same problem. Since I am in a slip with power access, the only continuous electrical appliances
on constanly are refigeration, battery charger
and GFCI outlets. The bilge pump
also checked out ok.
In addition to the keel, I am also getting some electrolysis
on the bronze
strut. The 2 zincs placed forward of the strut are barely being sacrified. The max prop zinc is about 50% sacrificed meaning its doing its job.
The receptacle outlet on the boat
checked out OK. Totally perplexed. Any suggestions on what to look for next.