Product Composition And Structure
Basic Components
Anode (copper core wire + conductive sheath), pre-filled material - petroleum calcined coke, textile covering layer, long - fiber braided layer.
Copper Core Wire
The continuous copper core wire provides stable current for the anode. To ensure flexibility, it is composed of 108 strands of tinned copper wires that are repeatedly stranded.
Conductive Sheath
As the main body of the anode, it has good electrical conductivity. It can protect the copper core wire from external corrosion and conduct the protection current.
Petroleum Calcined Coke Powder
- Reduces the contact resistance between the auxiliary anode and the soil.
- Enables the electrochemical reaction to occur between the carbon powder/soil electrolyte around the auxiliary anode, ensuring that the object to be protected is free from electrochemical corrosion and extending the service life of the auxiliary anode.
Textile Covering Layer
- Envelops the carbon powder around the anode in a circular shape with a certain packing density, ensuring that the carbon powder does not displace, loosen, or scatter during storage, transportation, construction, and use, thus affecting the normal use and service life of the flexible anode.
- Should have good abrasion resistance, puncture resistance, and mechanical strength.
- It should be corrosion-resistant itself, which is more important for applications in water.
Long - fiber Braided Layer
- Protects the textile covering layer from wear during the construction and installation of the flexible anode, and further tightens and fixes the carbon powder and the textile covering layer.
- Should have good abrasion resistance and mechanical strength.
- It should be corrosion-resistant itself, which is more important for applications in water.
Product Applications
- Cathodic protection of buried steel long-distance transportation (oil, gas, water) pipelines.
- Cathodic protection of the bottom plates of large-scale steel storage tanks.
- Cathodic protection in areas with dense pipe networks, such as stations, power plants, and chemical plants.
- The main body of the conductive polymer-type flexible anode is an integrated, uniform, and continuous structure composed of a copper wire and a conductive polymer sheath.
- The protection current is evenly distributed.
- It has a minimal interference effect on surrounding metal structures.
- In complex and dense pipe network areas, there is no shielding or interference.
- The flexible anode can be arbitrarily cut at the construction site according to the needs of the object to be protected, which is convenient and flexible to use.
- It has an excellent protection effect, especially for complex pipe networks, aging pipelines, storage tank bottom plates, and high-resistivity environments, which is incomparable to other anodes. The flexible anode does not pollute the environment.
Anode Body
| Maximum allowable current density with pre-filled material in soil environment |
52mA/m |
| Anode diameter |
With copper wire,without pre-filled material |
≥13.0 mm |
| With pre-filled material |
Φ38±2.0 mm |
| Nominal cross-sectional area of copper core wire |
GB/T 2951-2008 |
13.3mm²or customized |
| DC resistance of copper core wire |
GB/T 3048.3-2007 |
≤1.55Ω/km |
| Volume resistivity of conductive sheath |
GB/T 3048.4-2007 |
1.1-1.9Ω·cm |
| Immersion Test |
GB/T11547-2008 |
| 3%NaCl 168 hours,mass loss change |
≤1.0% |
| 3%Na₂SO₄168 hours,mass loss change |
≤1.0% |
| 10%NaOH 168 hours,mass loss change |
≤1.0% |
Petroleum Calcined Coke
| Fixed carbon content |
GB2001-91 |
98.0% |
| Partice size |
YS/T587.12-2006 |
0.1mm-1.0mm |
| Volume resistivity |
GB/T24521-2009 |
≤600μΩ·m |
| Pre-filled quantity |
|
1.15 kg/m |
Textile Sleeve
| Mass per unit area |
GB/T4669-2008 |
≥150g/m² |
| Bursting strength |
ISO3303-1990 |
≥500N |
| Abrasion resistance |
GB/T21196.2-2007 |
≥100 times |
| Puncture resistance |
ASTM D4833-2007 |
≥500N |