Aluminum Anode for Cylindrical Heat Treatment

This aluminum anode ball is a compact easily replaced sacrificial anode which is installed in heat treaters, pressure vessels and other production vessels. The aluminum heater treater anodes work optimally at relatively high temperatures and low chloride saltwater or freshwater environments.


The aluminum heater treater anode serves as a sacrificial anode, providing exceptional corrosion protection across various industries. Its applications include heater treaters, heat exchangers, saltwater storage tanks, oilfield tanks, skimmers, oil-separation vessels, pressure vessels, and production vessels.

This cylindrical aluminum anode, measuring 3 inches in diameter, features a cast design with a 3/4-inch all-thread steel rod core. It is well-suited for structures requiring a compact solution in environments with higher temperatures or lower chloride saltwater conditions.

Designed to be mounted in fiberglass “Red-Cap” or “Blue-Cap,” this cylindrical aluminum anode can be easily installed and replaced using a standard 4-inch (100 mm) schedule 40 or schedule 80 pipe nipple with a grooved coupling.

Quality Substrate Material

Casted from high-voltage and high-potential alloy, our aluminum anode is designed to meet the standard GS EP COR 201, containing nominal amounts of indium, zinc, and silicon. It has a proven track record for delivering superior cathodic protection in highly corrosive saltwater/brines with elevated temperatures.

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 performance of this aluminum condenser anode remains stable in seawater and electrolytes with chloride ions due to its operating potential maintained within the range of -1.05 to -1.10 volts concerning 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)


Two Mounting Head Options

The anode for heat treating applications can be combined with compression-molded fiberglass mount caps (available in blue or red) and connected using lead wires for fast installation. The cap features four integrated ribs for optimal skid resistance, proper alignment, and superior stability during anode flow. The red cap fits into standard 4″ SCH 40 fittings with grooved couplings, while the blue cap is suitable for installation in standard 4″ SCH 80 fittings using grooved Victaulic® couplings.

Customized Configurations

Below are examples of two commonly used sizes for heater treater anodes. We also offer customized options for shapes, weights, and configurations upon request.

Item No. Anode Dimensions Insert Dimensions Weight
JA–AL–R30 Ø3″ (Ø76 mm) 30” (762 mm) 3/4”-10 UNC STUD 18.5 lbs (8.4 kg) 22 lbs (10 kg)
JA–AL–R60 Ø3″ (Ø76 mm) 60” (1524 mm) 3/4”-10 UNC STUD 37.0 lbs (16.8 kg) 44 lbs (20 kg)



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