Zinc Sacrificial Anode
Zinc Sacrificial Anode – Efficient Galvanic Corrosion
Protection
The Zinc Sacrificial Anode is an essential component in cathodic
protection systems, engineered to safeguard metal structures from
corrosion—especially in marine, underground, and industrial environments.
Designed to corrode preferentially, it diverts corrosive forces away from
critical infrastructure like pipelines, vessels, storage tanks, and reinforced
concrete.
Core Features
- Galvanic
(Self-Powered) Protection
Relies on zinc’s natural electrode potential difference (approximately
–1.1 V vs Cu/CuSO₄) to automatically deliver
protective current—no
external power source needed
- Reliable in
Saltwater
Ideal for seawater, brackish water, and moist soils. Unlike highly
reactive metals, zinc maintains consistent protection without excessive
passivation in typical conditions
- Versatile
Configurations
Available in a variety of shapes—discs, rods, plates, collars, and custom
castings—to suit diverse installation needs such as hulls, shafts,
pipelines, tanks, heat exchangers, and structural steel .
- Easy
Installation & Low Cost
Simple bolt-on or welded attachment, lightweight cast alloy design, and no
complicated power or control systems. Excellent for remote or localized
protection needs
Benefits at a Glance
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Benefit
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Description
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No Electrical Infrastructure
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Self-powered setup eliminates the need for rectifiers
or external power equipment
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Low Maintenance
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Typically requires annual inspection and replacement
once ~50% consumed
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Cost-Efficient Lifecycle
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Lower upfront and operating costs compared to
impressed-current systems
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Typical Applications
- Marine and
Offshore: Ship hulls, propellers,
rudders, offshore platforms, intake systems.
- Buried or
Submerged Infrastructure: Pipelines,
storage tanks, piers, piling casings, and heat exchanger units.
- Concrete-Reinforced
Structures: Underwater and underground
steel in bridges, buildings, and water treatment plants.
Installation Guidelines
- Ensure
Metallic Contact
Attach the anode directly or via a wire/strap to the bare metal
surface—paint or coating must be removed to ensure conductivity
- Adequate
Surface Area
Use an amount equal to ~1% of the protected structure’s surface area or
follow engineering design guidelines for coverage
- Replacement
Alerts
Inspect regularly and replace the anode once ~50% mass loss is observed to
maintain protection
Summary
The Zinc Sacrificial Anode is a cost-effective solution for
corrosion prevention. With dependable galvanic protection, simple installation,
and adaptability across a wide range of structures—from water heaters to
offshore rigs—this product ensures long-lasting durability and minimized
maintenance.
