Square Bolt-On Aluminum Bracelet Anode with Half-Shell Design

Indium-activated half-shell aluminum bracelet anode for submarine/offshore pipeline cathodic protection, flush fitting with concrete.



This aluminum bracelet anode, activated with indium, is engineered to provide cathodic protection for submarine or offshore pipelines. It features a half-shell design composed of two semi-circular parts that are secured around the pipeline. Electrical connection between the anode and the pipe is facilitated either through a steel continuity bar or an electrical cable. The square-ended configuration of our half-shell aluminum bracelet anodes ensures compatibility for seamless integration with concrete coatings.

Quality Substrate Material
Our bracelet anode is crafted from low-iron, high-purity alloys and conforms 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 aluminum bracelet anode maintains stable performance in seawater and electrolytes with chloride ions due to its operating potential range of -1.05 to -1.10 volts relative 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)


Customized Configurations
The dimensions of the anodes are typically designed to match the dimensions of the pipe. Custom configurations can be provided upon request.


Utilizing the ISO 9001:2015 quality management system and stringent internal testing protocols, we guarantee the optimal longevity and performance of our anodes. Every anode is assigned a distinct serial number for quality monitoring purposes.

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