Zinc Replacement Service
❋ From $20 per zinc + parts
Protect your vessel from corrosion
Zinc anodes are a critical component in protecting your vessel from galvanic corrosion. When zincs are worn or improperly installed, underwater metals such as shafts, props, trim tabs, rudders, and through-hulls become vulnerable to accelerated damage. Our professional zinc replacement service ensures your vessel remains properly protected year-round.
When zincs are not replaced on schedule, corrosion does not stop — it accelerates. Once sacrificial protection is lost, electrical current seeks the next most reactive metal, often targeting shafts, props, through-hulls, or other critical components. Damage can progress quickly and may not be visible above the waterline until it becomes severe.
Inspection and Replacement
Zinc inspection involves evaluating condition, attachment, and wear patterns. Zinc replacement includes removal of depleted anodes and installation of new zincs.
Replacement is recommended once zincs reach approximately 50% depletion or show signs of improper function.
Zinc replacement works best as part of a broader preventative maintenance strategy that includes routine hull cleaning and periodic underwater inspections. Addressing corrosion and fouling together reduces long-term maintenance costs and improves vessel performance.
Zinc Lifespan and Pricing
Zinc anodes are essential for protecting your vessel’s underwater metals from corrosion. Over time, they naturally wear down and lose effectiveness, so periodic inspection and replacement are necessary. Regular maintenance ensures your props, shafts, rudders, and other critical components remain protected, preventing costly repairs.
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This small zinc shields the propeller nut and spinner. Although compact, it’s crucial for preventing metal loss that could loosen or damage the propeller assembly. Pricing: Generally lower-cost per zinc, quick to replace during standard service
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Large, flat anodes attached to the hull to protect expansive metal areas, often used on commercial or larger vessels.
Pricing: Higher; labor and material cost reflect size and installation complexity.
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Installed around the prop shaft, this zinc protects one of the most critical underwater components from galvanic corrosion. Shaft zincs prevent damage to the shaft and bearings.
Pricing: Shaft zinc replacement is typically higher than individual anodes due to labor and accessibility, usually mid-range among zincs.
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Protects the rudder, rudder post, and trim tabs from corrosion caused by currents and stray electrical flows. These components are vital for steering and vessel handling, so keeping zincs in good condition is essential.
Pricing: Moderate; labor may vary depending on access and configuration.
How It Works
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Contact us with your vessel details, marina location, and the services you’re requesting. We’ll confirm availability, marina requirements, and any access or authorization needed.
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Once approved, we schedule service at a time that works with marina operations. In most cases, the owner does not need to be present as long as proper authorization and access are provided.
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Our insured divers perform the requested services in-water using appropriate tools and methods for the vessel, coatings, and hardware. Safety, compliance, and care of underwater surfaces are prioritized at all times.
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While performing service, we visually inspect underwater components such as zincs, running gear, and hull condition. Any notable findings are communicated following completion.
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Once service is complete, we confirm the work performed and provide notes or photo documentation upon request, particularly for inspections or zinc replacement.
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For consistent protection and performance, we offer recurring maintenance schedules tailored to vessel usage, marina conditions, and environmental factors.