Sacrificial Zinc Anode Replacement
Protect your shafts, props, and expensive running gear from unseen electrical currents. Our divers inspect and replace zincs underwater.
What is Galvanic Corrosion?
When two different submerged metals physically touch each other (like a bronze propeller on a stainless steel shaft) in conductive salt water, they create an underwater battery. The less noble metal will literally dissolve to protect the more noble metal. This is called galvanic corrosion, and it can destroy thousands of dollars worth of running gear in months.
By bolting highly active "sacrificial" zinc anodes to your underwater gear, the electrical current attacks the cheap zinc instead of your expensive props, shafts, bow thrusters, and trim tabs.
Our Zinc Replacement Process
- 1
Visual Inspection
During every hull cleaning, our divers visually inspect all anodes. If a zinc is less than 50% depleted, we scrub it clean to reactivate it and leave it alone.
- 2
Inventory Sourcing
If a zinc is beyond 50% depleted, we source the exact manufacturer-specified collar, button, or teardrop zinc designed for your gear.
- 3
Surface Preparation
A new zinc is useless if it doesn't make flush electrical contact. We thoroughly wire-brush the mounting surface before installation.
- 4
Underwater Installation
Using underwater pneumatic tools and tight tolerances, we secure the new anodes to ensure maximum structural integrity and electrical bonding.
Protect Your Boat
Don't wait until the damage is done. Hot marinas with high stray currents deplete zincs fast.
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