Aluminum Boats on Steel Docks

We just purchased an aluminum boat. It is primed and painted with bottom paint and reg on the top sides. It has about 7 anodes on it.

We have two choices to keep the boat this summer, one has steel docks constructed of steel drums held together with steel structure covered with wood. This is all held with steel chains. The other location has concrete main docks and aluminum finger docks.

The problem is we like the community at the first as the second is a municipal marina and has little charm.

I have read about electrolysis and all that stuff, I am planning to hand Zinc anodes over the side in either case.

What are your thoughts/suggestions? Thank you. Don

Hi Don: Congratulations on the new boat!

The issue is the electrical potential between the boat and the dock. As long as you are isolated electrically, you are OK. The biggest issue will be your shore power cord. Make sure this is done correctly, and that you have an isolation transformer in the circuit on your boat–so that you are isolated from the shore earthing/grounding system–which will also include the steel dock. – Steve


Posted by Steve Dashew  (November 30, 1999)



Comments are closed.