Aluminum Tank Anodes
Aluminium anodes are ideally suited as sacrificial anodes for cathodic protection system installed on the internal surface of tanks, including water tanks and oil storage tanks.
| Element | GS EP COR 201 |
| Al – Zn – In | |
| Zinc (Zn) | 4.75 – 5.75% |
| Indium (In) | 0.015 – 0.02% |
| Cadmium (Cd) | 0.002% Max. |
| Silicon (Si) | 0.06 – 0.12% |
| Iron (Fe) | 0.12% Max. |
| Copper (Cu) | 0.003% Max. |
| Others Total | 0.10% Max. |
| Aluminum | Remainder |
| Operating Potential (Negative Volts) | Current Capacity | Consumption Rate | Current Efficiency | Solubility |
| -1.05 – 1.10 | 1135A.h/lbs (2500A.h/kg) | 7.6lbs per amp.yr | 90% Min. | Solute Uniformly |
Open/close circuit potential is with respect to a Saturated Calomel Reference Electrode.
| Anode Model | Unit Weight | Anode Size | ||
| N. W | G. W | La × (Wt + Wb) × H | ||
| JA – AL – T22 | 21.4lbs (9.7kg) | 22.0lbs (10kg) | 29.5″ × (4.5″ + 5.3″) × 5.1″ (750 × (115 + 135) × 130mm) | |
| JA – AL – T35 | 33.0lbs (15kg) | 35.3lbs (16kg) | 19.7″ × (4.5″ + 5.3″) × 5.1″ (500 × (115 + 135) × 130mm) | |
| JA – AL – T50 | 48.5lbs (22kg) | 50.7lbs (23kg) | 19.7″ × (4.1″ + 5.3″) × 4.0″ (500 × (105 + 135) × 100mm) | |
| JA – AL – T77 | 70.6lbs (32kg) | 77.2lbs (35kg) | 11.8″ × (4.1″ + 5.3″) × 4.0″ (300 × (105 + 135) × 100mm) | |
Other configurations are available on request.
All weights and dimensions are nominal and subject to variation in material compositions and Jennings Anodes foundry tolerance.
We employ rigorous internal casting and testing standards to ensure the optimum lifespan and performance of our Anodes. Third party testing is available upon request.
Each anode is labelled with a unique serial number for quality tracking.
| Testing | Chemical Composition | Electrochemical Properties | Physical Properties & Appearance | ||
| Testing Standard | ISO 9001 Quality Management System and Foundry Internal Quality Standard | ||||
| DNVRP B401 GALVALUM III | NACE TM0190 | NACE SP0387, Foundry ITP | |||
| Item | Chemical Analysis | Circuit Potential, Current Capacity, Current Efficiency | Surface Appearance, Weight & Dimensions, Steel Core, Resistance between Steel Core and the Anode. | ||
| Equipment & Devices | Optical Emission Spectrometer OBLF QSN 750 | Electrochemical Analyzer EPI 200, Reference Electrode | Calibrated digital measuring devices | ||
We have strict packing protocols to guarantee safe delivery of our products. Clear shipping marks and documentation make delivery acceptance straightforward and simple.
Custom packing is available upon request.
Shipping Documents:
- Proforma invoice
- Packing list
- Testing reports (Chemical Composition, Electrochemical Properties Test, Certificate of Compliance)
- Others upon request (e.g. Certificate of Origin)
Why is aluminium best for tanks?
The steel tank base or bottom plate is the area that is most prone to severe corrosion in storage tanks. Corrosion in this area is exacerbated by the sediment contents of the contained liquid which will settle here.
Accelerated corrosion can also occur on the external surface of the base, especially for heated tanks due to the temperature differential between one side of the tank and the other.
Aluminium is considered a safe and popular choice for cathodic protection systems installed on tank surfaces.
Other sacrificial anodes (e.g. magnesium) are considered too active, resulting in over protection which can prove detrimental to long-term performance, whereas zinc anodes can be vulnerable at high temperatures.
