Boat Sacrificial Anodes

Anodes are the cheapest insurance a boat can buy: sacrificial blocks of zinc, aluminium or magnesium that corrode so your propeller, shaft, rudder and engine do not. This collection covers the full range - hull anodes, shaft and prop anodes, rudder and skeg anodes, bow thruster and saildrive anodes, engine pencil anodes and fixing kits - from MG Duff, Tecnoseal, Vetus and other trusted names.

Match the anode metal to your water: zinc for salt water, aluminium for salt and brackish, magnesium for fresh water only. Fit like-for-like replacements in the same positions, never paint over an anode, and replace any anode that is more than half wasted. If your anodes are disappearing fast, that is a warning sign of a galvanic problem worth investigating, not a reason to fit bigger ones.

Boat Anodes For Sale

We offer boat anodes crafted from three distinct metals: aluminum, magnesium, and zinc. It's worth noting that the weight of the anode directly influences its longevity.

If you're unsure about which boat anode suits your vessel best, here's a handy guide:

Aluminum Anodes: Ideal for brackish water and saltwater environments, aluminum anodes boast a higher electrical capacity, allowing for the use of smaller anodes without compromising effectiveness.

Magnesium Anodes: Specifically designed for freshwater use, magnesium anodes react more rapidly in seawater, making them unsuitable for marine environments. In freshwater, however, they significantly reduce loss rates due to their lower open circuit potential.

Zinc Anodes: Best suited for saltwater applications, zinc anodes offer superior impact strength, ensuring effective protection in corrosive marine conditions.

Our comprehensive selection of boat anodes features trusted brands such as Tecnoseal, MG Duff, Volvo, and more.