Aluminum Tank Anode with Crancked Rod Insert

The ship’s ballast water tank is subject to galvanic corrosion, especially its internal steel structure immersed in seawater. The only way of preventing corrosion in ballast tank, when coatings become damaged or ultimately break down, is to apply sacrificial anodes.

This aluminum tank anode with double cranked rod core is the most common anode types applied in cathodic protection of vessel’s tank. It is suitable for new vessels, or used to replace existing anodes in old vessels.





Quality Substrate Material
Casted in low-iron, high-purity alloys, our aluminum tank anode is designed to meet the standard GS EP COR 201.

Element GALVALUM III DNV-RP-B401-2011 GS EP COR 201
Zinc (Zn) 2.0% ~ 6.0% 2.5% ~ 5.75% 4.75% ~ 5.75%
Indium (In) 0.01% ~ 0.02% 0.015% ~ 0.04% 0.015% ~ 0.02%
Silicon (Si) 0.08% ~ 0.2% 0.12% max. 0.06% ~ 0.12%
Iron (Fe) 0.13% max. 0.09% max. 0.12% max.
Copper (Cu) 0.006% max. 0.003% max. 0.003% max.
Cadmium (Cd) 0.002% max. 0.002% max.
Total Impurities 0.1% max. 0.1% max. 0.1% max.
Aluminum (Al) Remainder Remainder Remainder

Low Driving Voltage
This aluminium tank anode provides a stable performance in seawater and electrolytes containing chloride ions as its operating potential is kept between -1.05 to -1.10 volts relative to saturated calomel electrode(SCE).

Technical Measurement Performance
Open Circuit Voltage (-V) 1.10 min.
Closed Circuit Voltage (-V) 1.05 min.
Current Capacity 1135 A.h/lbs (2500 A.h/kg)
Current Efficiency 90% min.
Consumption Rate 7.6 lbs/A·y (3.4 kg/A·y)

Much Lighter in Weight
The aluminium tank anode is less dense than zinc, making it lighter and easier for handling when fitting.

Strict Quality Control
By conforming to ISO 9001:2015 standards, our aluminium tank anode is manufactured, inspected, and tested in accordance with stringent procedures to ensure high quality.

Customized Configurations
Based on over 50 years’ production experience, Jennings Anodes can customize the anode shape, sizes, and service life to meet your specific needs upon request.


Main Technical Parameters








Ballast Water Tank



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