High Silicon Cast Tubular Anodes by Anotec

Ultra-Reliable Cable Connection. Thicker Walls for Improved Impact Resistance

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

  • Accelerated corrosion tests confirm that Anotec chill cast anodes yield more ampere-years per pound than the competition

Anode Composition

  • High Silicon Cast Iron
  • ASTM A518 Grade 3 Chemistry
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

Chill Cast in Static Metal Molds

  • Anotec’s proprietary chill casting process assures a solid stick anode that will outperform the competition.
  • Can withstand drop impact tests to more than twice the height of sand cast anodes.

ISO 9001 Quality Control

  • Anodes are manufactured, inspected, and tested in accordance with stringent procedures to ensure high quality.

Tubular Anode Features

  • Thicker Walls & Expanded Head - Improved impact resistance and shipment reliability. Extra thickness at the connection zone where you need it.
  • Reliable Cable Connection - A proprietary zinc connector is hydraulically pressed into an internal taper at the anode center. The cable connection can withstand 2200 lb force.
  • Low Connection Resistance - Anotec’s quality controlled assembly process ensures a connection resistance less than 0.001 ohms.
  • Performance - Accelerated corrosion tests confirm that Anotec chill cast anodes yield more ampere-years per pound than the competition. Their compact diameter also enhances deep well utilization. 

 

 

Physical Dimensions of Tubular Anodes

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

Anode Consumption

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.

Current Density Limitations

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.

Nominal Discharge Guide for Anode Tubular Anodes

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].

Specify the following when ordering Anotec Tubular Anodes:

  • The anode size (see anode dimension chart).
  • Quantity of anodes needed.  If the anodes are to be installed in "sets" or groups, please specify the number of anodes in each set.
  • Cable size (AWG), length and insulation type.
  • Is the cable to be placed on a wooden reel or is a coil of cable sufficient?
  • Packaging requirements.  Farwest palletizes the anodes on a sturdy wooden pallet and the anodes are banded and shrink wrapped to the pallet.  If additional protection, a full crate can be provided at additional cost.
  • Any custom or non-standard requirements required.