Dual Cranked Flat Bar Insert Slim Stand-Off Aluminum Anode

The Slender Stand-Off Aluminum Anode with Double Cranked Flat Bar Insert is a specialized cathodic protection solution for inshore structures and marine engineering facilities. It features a trapezoidal cross-section and is cast onto a cranked galvanized steel flat bar insert, ensuring a robust connection when welded to the protected steel structure. With its protruding design, the anode material does not directly contact the surface to be protected, enhancing its longevity and efficiency.



This slim stand-off aluminum anode features a trapezoidal cross-section and is attached to a bent galvanized steel flat bar insert. The steel core integrated into the casting can be welded directly onto the surface of the steel structure being protected, ensuring a secure connection.

Because the stand-off aluminum anode extends outward from the surface, it does not come into direct contact with the protected surface. This design optimizes the utilization of the anode over its lifespan, with an anode utilization factor that can reach between 85% and 90%.

This type of anode is specifically designed for cathodic protection applications in coastal or marine environments, such as offshore platform jackets, drilling rigs, harbor walls, jetties, wind farms, reclamation pile, and sheet pile installations.

Quality Substrate Material
Our slim stand-off anode is crafted from low-iron, high-purity alloys and adheres to ISO, NACE, and DNV standards.

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
The stand-off aluminum anode demonstrates consistent performance in seawater and electrolytes with chloride ions due to its operating potential being maintained within the range of -1.05 to -1.10 volts compared to the 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 aluminum anode’s lower density compared to zinc results in a lighter weight, making it more manageable during installation.

Customized Configurations
Our slim stand-off aluminum anodes are categorized as Short and Long based on their length-to-width ratio. This ratio directly impacts the anode’s resistivity and consequently its current-carrying capacity.


We utilize the ISO 9001:2015 quality management system along with strict internal testing protocols to guarantee the maximum durability and effectiveness of our anodes. Every anode is marked with a distinctive serial number to facilitate quality monitoring.

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