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Sacrificial Boat Anodes & Zincs

Maintenance is an important part of owning a boat and, depending on your environment, your sacrificial anodes may need to be checked and replaced fairly often. Boat anodes (also referred to as boat zincs) protect the metal parts of your boat from galvanic corrosion, which occurs when any two dissimilar metals are physically or electrically connected and immersed in water (such as the shaft, rudder, outboard, stern drive or propeller). Those conditions create a circuit (just like a battery) with current flowing from one of the metals to the other. The current is comprised of electrons, or metal pieces, leading to corrosion of the metal providing the electrons. A sacrificial anode, added to the circuit, is designed to provide the electrons to the circuit instead of the other metals, preventing galvanic corrosion of those important parts. As a result, checking and replacing anodes periodically is a critical part of any boater’s maintenance schedule. Fisheries Supply carries a wide variety of mil-spec aluminum and zinc anodes for boats (for salt water applications) and magnesium anodes (for freshwater applications) from trusted brands like Martyr by Canada Metal, Sea Shield, Sierra and more – so shop for your anodes today and protect your investment!

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