Low Consumption Rate
Our tubular high silicon cast iron anode is centrifugal chill casted. 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.
Strengthened Canister Housing
The anode is installed in a spirally welding 0.65 mm thick galvanized steel canister. The canister is biodegradable and will corrode in service. It should be stored in a dry place before installation to avoid corrosion and perforation.
Uniform Coke Filled with Centralizer
The canister may be supplied in a variety of diameters and lengths to suit the specific anode/groundbed design. Preloaded canister ensures the anodes are evenly surrounded with the proper amount of compacted coke breeze backfill.
Low Ground Resistance
The coke backfill provides a homogenous environment for high silicon cast iron anode and can substantially lower the anode to earth resistance. It is an ideal cathodic protection material for high soil resistivity.
Canister high silicon cast iron anodes reduce installation costs by providing the anode and coke backfill in a self contained package. The assembly process is finished within our foundary instead of in the field, which effectively guarantees field installation quality of anode bed.
|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.|
Note: ASTM A518 Grade 3 chemistry is particularly suited for electrolytes rich with chloride ions, where the level of chromium is elevated to enhance anode performance.
For anodes of the same chemistry and microstructure, variance in consumption is primarily due to the chemical and physical characteristics of the anode environment. The consumption rate does not appear to be significantly affected by current density (amperes per unit area of anode surface).
|Environment||Nominal Current Density||Consumption Rate|
|Soil / Fresh Water||0.2 ~ 0.5 A/ft² (2 ~ 5 A/m²)||0.2 ~ 1.2 lbs/A.y (0.1 – 0.5 kg/A.y)|
|Coke Breeze||0.5 ~ 1 A/ft² (5 ~ 10 A/m²)||0.1 ~ 0.7 lbs/A.y (0.05 ~ 0.3 kg/A.y)|
|Seawater||1 ~ 5 A/ft² (10 ~ 50 A/m²)||0.7 ~ 1 lbs/A.y (0.3 ~ 0.5 kg/A.y)|
Φ1.5″/2.5″ x 60″ (Φ38/63 x1524 mm)
Φ2″/3″ x 60″ (Φ51/76 x1524 mm)
Φ3″/4″ x 60″ (Φ76/102 x1524 mm)
Φ2.3″ x 84″ (Φ58×2134 mm)
Φ2.8″ x 84″ (Φ71×2134 mm)
Φ3.8″ x 84″ (Φ96x2134mm)
Φ4.8″ x 84″ (Φ122x2134mm)
Remarks: All dimensions and weights shown are normal. Non-standard sizes and weights of the anode are available upon request.