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The mystery of sacrificial anode lifespan 😆 | Ask The Expert with NIGEL CALDER
October 4, 2025 · 2 min · 3K views
What this video covers
Sacrificial anodes should typically last at least one year, and rapid consumption within six months indicates a significant change in the boat's environment or electrical system.▶ 1:51 Jan Attenstädt and Nigel Calder identify several factors that accelerate anode depletion, including higher water temperatures in southern latitudes, increased time spent in marinas with high electrical activity, and variations in the alloy composition of replacement anodes.▶ 0:53 Electrical issues often drive extreme consumption rates, such as a failed galvanic isolator or the absence of an isolation transformer when using shore power.▶ 1:27 If a vessel experiences a sudden, radical increase in anode degradation, owners must investigate potential faults in dockside wiring or internal electrical connections.▶ 1:38 In severe cases, engine anodes can dissolve in hours rather than months, signaling a critical failure that requires immediate troubleshooting.▶ 1:56 Identifying the root cause of accelerated corrosion requires isolating changes in boat usage, location, and electrical infrastructure.
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