I have a fiberglass catamaran
. I obtained a walk-on mooring
but at low-low tide the port rudder
touches bottom so I made up a shorter temporary rudder
out of a steel
plate welded to a galvanized pipe. I painted it with epoxy
barrier coat. It seems to work fine on the boat and doesn't seem to effect handling or show signs of corrosion
, however my saildrive
zincs are lasting three months.
I have all underwater metals bonded together, including the rudder, and they are also bonded to a hanging zinc. The rudder also has a zinc but this and the 'fish' don't corrode as quickly as the drives zinc. I am plugged to shore power
but no other boats around. Salt water
Is the rudder likely to be the cause of the excessive corrosion
? If it is, I can live with it for the convenience of the location but if there is likely to be another problem I need to address it. I appreciate that it's impossible to properly diagnose but any guidance would be appreciated.