For over 30 years, Anotec has been crafting the world’s best high silicon cast iron anodes. Farwest represents Anotec as a distributor and licensed manufacture and custom builds the Anotec line of anodes.
The Anotec proprietary chill cast process assures consistent weight and a superior (stronger) microstructure, combating corrosion and outperforming the competition by up to 20%.
Performance
Anode Composition
Silicon | 14.2 - 14.75% |
Chromium | 3.25 - 5.00% |
Manganese | 1.5% Max. |
Carbon | 0.70 - 1.10% |
Copper | 0.50% Max |
Molybdenum | 0.20% Max |
Anode Type | Length | Diameter | Weight | Surface Area |
2260 Z | 60" / 1520 mm | 2.2" / 56 mm | 36 lbs / 16kg | 2.9 (0.27) |
2660 Z | 60" / 1520 mm | 2.7" / 69 mm | 50 lbs / 23 kg | 3.5 (0.33) |
3860 Z | 60" / 1520 mm | 2.9" / 74 mm | 62 lbs / 28 kg | 3.8 (0.35) |
2284 Z | 84" / 2130 mm | 2.2" / 56 mm | 50 lbs /23 kg | 4.0 (0.37) |
2684 Z | 84" / 2130 mm | 2.7" / 69 mm | 70 lbs / 32 kg | 4.9 (0.46) |
3884 Z | 84" / 2130 mm | 2.9" / 74 mm | 90 lbs / 41 kg | 5.3 (0.49) |
4884L Z | 84" / 2130 mm | 3.2" / 82 mm | 123 lbs / 56 kg | 5.9 (0.55) |
4884H Z | 84" / 2130 mm | 3.7" / 94 mm | 175 lbs / 80 kg | 6.8 (0.63) |
4884X Z | 84" / 2130 mm | 4.2" / 107 mm | 245 lbs / 111 kg | 7.7 (0.72) |
4884S Z | 84" / 2130 mm | 4.8" / 122 mm | 315 lbs / 143 kg | 8.8 (0.82) |
Note: If you have questions about anode applications, contact a Farwest representative for assistance.
High silicon, cast iron, tubular anodes are used for a variety of cathodic protection applications including deep well anode systems, shallow anode installations, offshore applications as well as many other types of cathodic protection systems.
Tubular anodes are popular for their increased surface area, higher current output, centered cable connection and enhanced sealing properties due to the additional sealing materials used inside the anode.
Recommended cables sizes are #8, #6 and #4 AWG copper cable, which range in pull strengh from 400 pounds to 1,300 pounds. Available cable insulation types include High Molecular Weight Polyethylene (HMWPE) or dual insulated Halar/HMWPE or Kynar/HMWPE for use in high chloride environments. After the connection is made, it can be sealed with polyurethane or a combination of polyurethane and Novoid A electrical sealant.
Anodes with custom length cable
The consumption rate of High Silicon Chrome Cast Iron anodes has been found to be between 0.2 and 1.2 pounds per ampere-year. 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). The use of coke breeze around the anode in soil ground beds will tend to lower the consumption rate. A generally accepted design guideline for anodes buried in coke breeze is 0.7 pounds per amp-year.
The maximum stable current density of discharge may be limited by the environment regardless of the anode type. In free flowing water or in very wet soil ground beds, there is very little restriction on current density. However, anodes buried in clay soils tend to suffer "electro osmotic drying", a phenomenon of magnitude directly proportional to current density. For any particular soil with electro osmotic characteristics there will tend to be a critical maximum current density at the anode soil (or coke breeze to soil) interface, above which progressive drying occurs, with corresponding increases in anode-soil resistance. Drying is usually reversible by increasing soil moisture and/or lowering current density.
As a guideline to minimization of electro osmotic drying in groundbeds installed in clay soils, use of the following design maxima has resulted in stability of 90 to 95 percent of beds in areas of high osmotic drying potential.
Average soil resistitivityalong groundbed, Ohm-cm | Maximum Amps per anode in a coke breeze column, 12" OD by 60" | Equivalent current density on surface of coke breeze column, Milliamps/sq ft |
---|---|---|
Less than 1000 | 2.00 | 127 (see note) |
1000 - 1500 | 1.75 | 111 (see note) |
1500 - 2000 | 1.50 | 96 |
2000 - 3000 | 1.25 | 80 |
Over 3000 | 1.00 | 64 |
Note: For greater success, limit current density to less than 100 mA/sq ft for soils of less than 1500 ohm cm resistivity.
Anotec Anode Type |
Nominal Weight |
Current at 0.75 - 1.0 A/sq ft 8.1 - 11 A/sq m |
Nominal Dia. |
Nominal Length |
Nominal Area |
lbs (kg) | Amps | inch (mm) | inch (mm) | sq ft (m2) | |
TUBULAR ANODES | |||||
---|---|---|---|---|---|
2284Z | 50 (23) | 3.2 - 3.8 | 2.2 (56) | 84 (2130) | 4.0(.37) |
2660Z | 36 (16) | 2.6 - 3.5 | 2.7 (69) | 60 (1520) | 3.5 (.33) |
2684Z | 70 (32) | 3.7 - 5.0 | 2.7 (69) | 84 (2130) | 4.9 (.46) |
3884Z | 90 (41) | 5.3 - 7.0 | 2.9 (74) | 84 (2130) | 5.3 (.49) |
4884 LZ | 123 (56) | 6.6 - 8.8 | 3.2 (82) | 84 (2130) | 5.9 (.55) |
4884 HZ | 175 (80) | 6.6 - 10 | 3.7 (94) | 84 (2130) | 6.8 (.63) |
4884 XZ | 245 (111) | 6.6 - 10 | 4.2 (107) | 84 (2130) | 7.7 (.72) |
Note: Maximum amperage based on maximum value in manufacturer publications, 15-year minimum life criterion (0.7 lb/amp-year of 0.31 kg/amp-year) at 80% utilization, or 1 amp/sq ft (10.8 amp/m2).
Warning: Reduce current density in clay beds with high osmotic drying potential. Refer to Anode Consumption and Current Density Limitations in this web page.
Reference: NACE Technical Committee Report "Impressed Current Anodes for Underground Systems" [T10A-10 latest].