ZINC ANODE 83x30 mm.

Function and technical context

Zinc anodes are cathodic protection elements designed to be electrochemically sacrificed in place of higher-value metal parts of the vessel, such as propellers, shafts, engine tails and hulls. This zinc anode measuring 83x30 mm acts as a sacrificial electrode in the galvanic protection system, attracting to itself the corrosion produced by the difference in electrical potential between different metals submerged in salt or brackish water. Its correct installation is essential to preserve the structural integrity of the submerged metal components of the engine or boat, since without active cathodic protection these parts would suffer accelerated corrosion that could lead to serious failures and costly repairs.

When to replace this part?

The main indicator that a zinc anode needs to be replaced is the visible loss of mass: when the anode has consumed approximately half of its volume, it has ceased to provide effective cathodic protection and should be replaced immediately. The recommended inspection for this type of component is at the beginning and end of each nautical season, although in areas with especially corrosive waters or in vessels with a high level of activity an intermediate inspection may be necessary. Replacing the anode preventively before it is completely exhausted is the most economical and effective measure to avoid irreversible damage to propellers, axles and transmissions.