Sacrificial Anode Replacement

$25.00

Sacrificial anodes protect critical underwater and other metals, such as propellers, shafts, trim tabs, and other running gear, from corrosion. When anodes become inactive or depleted to 50% or below, they must be replaced to ensure continued protection of these components.

Our divers remove worn anodes and install replacements using specialized techniques, ensuring each anode is bonded well and functions properly. You may supply the replacement anodes, or we can source them for you if needed.

Please select the quantity for each sacrificial anode to be installed. If anodes need to be ordered, contact us at (813) 796-3974 or include the part number or specific type needed in your service request.

If you are enrolled in our Performance Hull Cleaning Service, our divers routinely monitor anode condition during service visits and will notify you when replacement is recommended.

Sacrificial anodes protect critical underwater and other metals, such as propellers, shafts, trim tabs, and other running gear, from corrosion. When anodes become inactive or depleted to 50% or below, they must be replaced to ensure continued protection of these components.

Our divers remove worn anodes and install replacements using specialized techniques, ensuring each anode is bonded well and functions properly. You may supply the replacement anodes, or we can source them for you if needed.

Please select the quantity for each sacrificial anode to be installed. If anodes need to be ordered, contact us at (813) 796-3974 or include the part number or specific type needed in your service request.

If you are enrolled in our Performance Hull Cleaning Service, our divers routinely monitor anode condition during service visits and will notify you when replacement is recommended.

How Sacrificial Anodes Protect Your Boat

Saltwater conducts electricity, which allows small electrical currents to flow between different metals on a vessel. This can cause galvanic corrosion, where less noble metals deteriorate over time. In some cases, stray electrical current in the water or improper bonding can also cause electrolysis (stray current corrosion).

Sacrificial anodes are intentionally made from a less noble metal— typically zinc or aluminum for saltwater. Because of this, the electrical current causes the anode to corrode first—“sacrificing” itself to protect the more valuable metal components of your boat.

Over time, anodes gradually dissolve as they perform this protective role, which is why regular inspection and replacement are important for maintaining proper corrosion protection.

Unusual anode wear can indicate underlying electrical issues. If sacrificial anodes are deteriorating unusually quickly, it may indicate stray-current corrosion, electrical leakage from nearby vessels or dock systems, or improper bonding that allows excessive current to flow through the anodes. Conversely, if anodes are wearing unusually slow or appear inactive, it may indicate that the anode is not electrically connected to the vessel’s bonding system, is electrically isolated by paint or corrosion, or has developed a hardened oxide layer that reduces its ability to function effectively in seawater.