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Complete Line of Anodes
Harbor Island Supply produces a complete line of anode applications for ships, barges, tugboats and other work boats, onboard equipment protection for engines and heat exchangers (engine anodes or pencil zincs), condenser anodes and ballast tank anodes. Other anodes include keel cooler anodes, zinc propeller nut caps, pier anodes, piling anodes, submerged pipeline anodes and oceanographic instrument anodes. We also provide shaft collar zincs, donut collar zincs, rudder disc zincs, Mercury anodes, Volvo zincs, OMC zincs, Honda zincs, Yamaha zincs and Nissan/Tohatsu zincs, Suzuki zincs, Maxi Props, Arneson Drive Anodes, Hamilton Jet Anodes, Side Thruster Anodes, Gori Anodes, crab and shrimp pot zinc and aluminum anodes.
Zinc & Aluminum
Magnesium Anodes, Cast Magnesium Anodes and Packaged Backfill Magnesium Anodes meet AZ63, Alloy H-1 Grade A, Grade B or Grade C. Extruded Magnesium Rod meets AZ31 (GalvoRod Alloy). Magnesium Anodes are available as either bare or with plastisol coating for marine use. Packaged Backfill Anodes are for ground installations, and magnesium rods for boiler and tank systems.
Galvanic Corrosion is created when metals of different potentials are attached to each other and submerged in water or any solution that carries electrical current. Since different metals corrode at different rates, a current flow will be created from the faster corroding metal (anode) to the slower corroding metal (cathode). A reliable anode must be capable of continuously supplying electrical current throughout its life. HARBOR anodes are made from high purity base metals before being alloyed with controlled amounts of additives to enhance electrochemical properties and to offset the small amount of impurities that detract from current output. Improper or unalloyed anodes start off with a high current output which tapers off over time, thus providing insufficient current for long term protection.
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