MMO/Ti Flexible Anode
2.Component: Internal cable (anode lead), MMO wires, coke coating layer, acid and alkali resistant fabric layer, and wear-resistant braided mesh
3.Designed life: More than 25 years, can be customized according to customer requirements
4.Cable type: XLPE/PVC, HMWPE,PVDF/HMWPE, etc.
5.Advantages: Cost-effective solution for long-term corrosion protection;the high catalytic activity ensures efficient performance; flexible and adaptable to various structures; easy to install and integrate into existing systems; long service life and excellent chemical stability
6.Application: Suitable for cathodic protection projects, such as pipelines and large tank floors
The MMO/Ti Flexible Anode is a binary structure auxiliary anode made of cable and MMO titanium wire as the main materials. The anode body is composed of internal cables (anode leads) and MMO wires of equal length. The internal cables and MMO wires are connected by knuckles at equal intervals (usually 3m or 5m) to form a binary structure. Its outer structure is composed of coke coating layer, acid and alkali resistant fabric layer, and wear-resistant braided mesh. This anode operates based on the principle of impressed current cathodic protection. The titanium substrate provides mechanical strength and flexibility, while the MMO coating ensures high electrochemical performance. The anode is flexible, allowing it to conform to various shapes and sizes of structures.
| 16mA/ft | 50mA/ft | |
|---|---|---|
| Anode diameter (without filling) |
≥0.8mm |
≥1.6mm |
| Anode designed life | ≥25 years | ≥25 years |
| Anode consumption rate (with filling) |
≤6mg/A.a |
≤6mg/A.a |
| Maximum operating current density (with carbon backfill, soil environment) | 100A/m2 | 100A/m2 |
| Precious metal oxide coating thickness | ≥6g/m2 | ≥8g/m2 |
| MMO resistivity |
10-5Ω.cm |
10-5Ω.cm |
| Contact resistance between anode and cable joint | ≤1.0 mΩ | ≤1.0 mΩ |
| Anode resistivity |
≤0.007Ω/m |
≤0.007Ω/m |
Technical parameter
| Testing item | Testing standard | Parameter range | Performance |
| Assembled anode | |||
| Outer diameter | 36mm -- 40mm | 38mm | |
| Weight |
2.1kg/m--2.3 kg/m |
2.2 kg/m |
|
| Cable | |||
|
Size |
ASTM B263 |
Depends on requirements |
AWG 8 |
|
Resistivity |
ASTM B193 |
Changes with cable size |
1.34Ω/1000 m （20℃） |
|
Strand amount |
ASTM B-8 |
7 |
7 |
| Anode | |||
|
Substrate |
ASTM B265 |
TA 1 |
Pass |
|
Coating thickness |
ASTM B568 |
Changes with the performance required by the anode change |
≥6 g/m2（52.5mA /m） |
|
Accelerated life |
NACE TM108-2008 |
≥25 years |
Pass |
| Coke backfill | |||
|
Carbon content |
ASTM D5142 |
>98% |
99.35% |
|
Moisture |
ASTM D5142 |
<0.1% |
0.05% |
|
Ash content |
ASTM D5142 |
<2% |
0.6% |
|
Particle size (max) |
ASTM E1617 |
≤1.5 mm |
1.0 mm |
|
Anode/ cable connector |
|||
|
Contact resistance |
≤1.0 mΩ |
0.5 mΩ |
|
|
Joint spacing |
3 m ±10% |
3m |
|
|
Outer braided mesh |
|||
|
Tensile strength |
ASTM D6856 |
>6.8 kg/strand |
8 kg/strand |
Internal cable (anode lead)
There is a continuous insulated cable inside the anode fabric-covered tube. This cable is a 7-strand copper core cable made to match the current flow and length of the linear anode. The insulation material of the cable is HMWPE type, and the thickness of the insulation layer is greater than 2.8mm.
Anode and cable connection
The anode body shall be connected to the cable at maximum intervals of 3 m at the factory. These connection points (nodes) should ensure low-resistance connections and mechanical reliability, and have multi-level insulation and waterproofing systems.
Anode and cable connection
The anode body shall be connected to the cable at maximum intervals of 3 m at the factory. These connection points (nodes) should ensure low-resistance connections and mechanical reliability, and have multi-level insulation and waterproofing systems.
Anode fabric covered tube
1) The coating layer has continuity, permeability, obvious markings and can be used for on-site direct burial laying;
2) The covered protective tube should be durable, resistant to mechanical damage at the construction site, able to meet the needs of on-site transportation and installation operations, and should not cause breakage, punctures, or leakage of carbon powder backfill;
3) Hot melt adhesive with a minimum shear strength of 0.34MPa (22°C, after 5d) should be used at the joints of the covered tubes;
4) The minimum bending radius allowed for the assembled linear anode should not be greater than 76.2mm, and it will not damage the anode or fabric protective tube
5) The covered pipe should be able to allow the penetration of water and electric current.
Outer braided mesh
There should be an outer layer of mechanical braided mesh outside the outer covering tube of the wire anode. The material should be made of tough nylon and have the following properties:
1) The braid is made of a minimum of 24 strands of 0.7mm PVC-coated yarn;
2) The outer braid can adapt to bending at the highest temperature of 107°C and the lowest temperature of -40°C;
3) The outer braid should have a tensile strength of 6.8kg per strand;
4) The shape of the woven mesh grid is diamond, and the maximum spacing between each bundle is 63.5mm;
5) The braided fabric should be resistant to changes in ambient temperature and humidity, wear and heat.
Applications
MMO/Ti Flexible Anodes are ideal for specialized cathodic protection applications, particularly in situations where corrosion mitigation is highly required. Here are more details on their applications:
Pipelines
In the oil and gas industry and other sectors that rely on extensive pipeline networks, damaged coating can occur over time. They are employed to protect vulnerable sections of pipelines, preventing corrosion and extending the operational life of the pipelines.
Storage Tank Floors
Large storage tanks used for various liquids, such as petroleum products or chemicals, are subjected to potential corrosion on their floors. They are utilized in impressed current cathodic protection systems to safeguard these tank floors, reducing maintenance and repair costs while ensuring the integrity of the tank's structure.
Industrial Infrastructure
MMO/Ti Flexible Anodes are commonly used in various industrial applications where damaged coatings or high-resistance regions pose a corrosion risk. This includes protecting equipment, structures, and infrastructure components exposed to aggressive chemicals or harsh environmental conditions.
FAQ
Can the MMO/Ti Flexible Anode be customized for specific dimensions?
Yes, we offer customization services to meet specific project requirements. Please contact us for further details.
What is the expected service life of the anode?
It has a service life of 20+ years, ensuring long-term corrosion protection.
Can the anode be used in high-temperature environments?
Yes, the anode is designed to operate in a wide temperature range (-10°C to 80°C) and can withstand high temperatures.
Contact us
If you are currently selecting an MMO/Ti Flexible Anode for your project, please feel free to contact us at yangbo@tjanode.com. TJNE is a professional manufacturer and supplier of MMO/Ti Flexible Anodes, offering excellent technical expertise, comprehensive after-sales service, complete certification, fast delivery, secure packaging, and support for testing.
