Well, in plumbing you avoid corrosion, period. Anti-electolysis fittings are actually insulators that "break the circuit", if you will, of bi-metal conductivity as well as physically preventing the metals from contacting (touching) each other.

Copper is toxic to most marine life that would try to attach itself to a hull, and is frequently used in anti-fouling paint. But a whole copper bottom, that's a labor of love to maintain. The boat must have been gorgeous. :thumbsup:

Zinc is the preferred metal among sailors. Look at boat ads and you'll frequently see references to something like, "...zincs changed summer 2007...". The zincs actually get eaten up pretty fast. I guess there has to be a balance between corrosiveness and durability.

PC :stoned: