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Jennings Anodes - High Silicon Cast Iron Anode Sled
With six heavy high silicon cast iron tubular anodes mounted on a PVC pipe frame filled with reinforced concrete, this anode sled is designed to provide cathodic protection current to offshore structures such as oil platforms, piers, pilings, wharfs and similar structures which usually require relatively high levels of current in seawater. The anodes will be connected to a shore-based rectifier by means of two parallel insulated cables.
Centrifugal Casting Process
Our tubular HSCI anodes are centrifugal chill cast. The casting mold rotates at over 1000rpm producing a g-force that eliminates any trapped gas from silicon iron and throws any impurities to the inside bore of the anode where they do not hinder anode performance. Hence, the metal matrix is tight and dense, increasing the life of the anode.
Low Connection Resistance
With zinc wedge-lock or bolt connectors at the mid-point of the anode, our center connection structure ensures a low resistivity; less than 0.001 ohms. The balanced spread of current throughout the overall length extends the anode lifespan and results in a reliable current discharge to the surrounding environment. Moreover, the connection component is resin encapsulated using a high-quality Epoxy Resin to ensure the eradication of moisture ingress.
Low Consumption Rate
Coarse stippled surface texture enlarges the surface area to weight ratio, thus reducing the anode current density, giving 30% more amp-years than conventional stick anodes.
Easy Installation
A unique cable connection device can be provided for a rapid installation. On average, more than 200 anodes can be connected by two workers in less than eight hours.
| Element | ASTM A518 / A518M Grade 1 (Si – Fe) | ASTM A518 / A518M Grade 3 (Si – Fe – Cr) | BS 1591 1975 |
| Silicon (Si) | 14.2% ~ 14.75% | 14.2% ~ 14.75% | 14.25 ~ 15.25% |
| Chromium (Cr) | 0.5% max. | 3.25% ~ 5.0% | 0.5% max. |
| Manganese (Mn) | 1.5% max. | 1.5% max. | 0.5% max. |
| Copper (Cu) | 0.5% max. | 0.5% max. | — |
| Molybdenum (Mo) | 0.5% max. | 0.2% max. | — |
| Carbon (C) | 0.65% ~ 1.1% | 0.7% ~ 1.1% | 1.4% max. |
| Phosphorus (P) | — | — | 0.25% max. |
| Sulphur (S) | — | — | 0.1% max. |
| Iron (Fe) | Remainder | Remainder |
Remainder |
Main Technical Parameters
Substrate Shape Current Density Consumption Rate Weight Application Environment|
High Silicon Cast Iron |
|
Tubular |
|
1 ~ 5 A/ft² (10 ~ 50 A/m²) |
|
0.75 ~ 1.5 lbs/A.y (0.34 ~ 0.68 kg/A.y) |
|
1050.3 lbs (476.4 kg) |
|
Offshore Platform |
|
Seawater |
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 | ASTM E350 | ASTM E186/E446 | Foundry ITP |
| Testing Items | Chemical Analysis | Current Efficiency / Connection Resistance | Dimension & Weight / Surface Finish / Cable Connection / Lead Wire Pulling Tension / Epoxy Resin Sealing |
| Equipments | Optical Emission Spectrometer Labspark 750A / Thermoscientific Niton XL2-980 | Electrochemical Analyzer EPI 200 | Calibrated Digital Measuring Devices |