Slender Stand-Off Aluminum Anode with Cranked Flat Bar Insert

This slender stand-off aluminium anode with trapezoidal cross-section is cast on a cranked galvanized steel flat bar insert. The cast-in steel core protruding from back face can be directly welded to the surface of protected steel structure, ensuring a reliable connection.

As the satnd-off aluminium anode protrudes from the surface installated, so the anode material is not in direct contact with the surface to be protected. Thus, the stand-off anode is better utilized over their lifetime —— its anode utilization factor can reach up to 85 to 90%.

It is used for the cathodic protection of inshore structures or marine engineering facilities, including offshore platform jackets, drilling rigs, harbour walls and jetties, wind farms, reclamation’s pile, sheet pile, etc.



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Quality Substrate Material
Casted in low-iron, high-purity alloys, our slender stand-off anode is designed as per the standard of ISO, NACE, DNV.

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 stand-off aluminium 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 stand-off aluminium anode is less dense than zinc, making it lighter and easier for handling when fitting.

Customized Configurations
The slender stand-off anodes are further classified into Short and Long, depending on their ratio of length to width. A range of standard stand-off anodes are illustrated below, custom-made configurations are available upon request.

Aluminium Hull Anode with Flat Bar Stand-off from Casting Face Line Drawing

Item No. Anode Dimensions Anode Weight
JA-AL-MBF1 2″ (50.8 mm) 2″ (50.8 mm) 48″ (1219 mm) 21 lbs (9.5 kg)
JA-AL-MBF2 2″ (50.8 mm) 2″ (50.8 mm) 60″ (1524 mm) 26 lbs (11.8 kg)
JA-AL-MBF3 2 ½″ (63.5 mm) 2 ½″ (63.5 mm) 48″ (1219 mm) 30 lbs (13.6 kg)
JA-AL-MBF4 2 ½″ (63.5 mm) 2 ½″ (63.5 mm) 60″ (1524 mm) 39 lbs (17.7 kg)
JA-AL-MBF5 3″ (76.2 mm) 3″ (76.2 mm) 48″ (1219 mm) 48 lbs (21.8 kg)


Main Technical Parameters








Offshore Platform


We employ ISO 9001:2015 quality management system and rigorous internal testing standards to ensure the optimum lifespan and performance of our anodes. Each anode is labelled with a unique serial number for quality tracking.

Testing Details Chemical Composition Electrochemical Performance Physical Properties
Testing Standard DNV-RP-B401 NACE TM0190 Foundry ITP
Testing Content Chemical Analysis Circuit Potential / Current Capacity / Current Efficiency / Electrical Resistance Dimension & Weight / Surface Finish / Steel Insert
Equipments Optical Emission Spectrometer OBLF QSN 750 Electrochemical Analyzer EPI 200 Calibrated Digital Measuring Devices

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