Sacrificial anodes: treatment of galvanic corrosion
BlueSpine offers two families of galvanic anodes to protect the reinforcement in reinforced concrete structures. The tied anodes ensure the long-term effectiveness of localized repairs for at least 10 years, without the need for an external power source or wiring. Monitored anodes constitute a fully-fledged galvanic current cathodic protection (GCCP) system, compliant with EN ISO 12696 and NACE SP0290 standards, for areas requiring continuous monitoring throughout their service life.
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Ligated anodes
Ensure the longevity of localized repairs without power or wiring
Tied anodes are high-purity zinc sacrificial anodes with a hexagonal cross-section, pre-encased in a cementitious mortar with a high alkaline reserve. They are tied directly to the rebar during spot repairs to concrete, without the need for an electrical power source or wiring.
Designed for use in localized repairs, they ensure the durability of the repairs for at least 10 years by neutralizing the risk of induced anode corrosion—a mechanism whereby an unprotected repair accelerates corrosion in adjacent areas.
Key benefits
Active protection as soon as it is placed in the concrete
Easy installation by tying to the rebar
No power supply or wiring required
High inrush current due to the hexagonal cross-section
Prevention of anode-induced phenomena and corrosion in adjacent areas
Ensuring that localized repairs last for at least 10 years
Applications
Spot repairs to reinforced concrete structures
Treatment of localized corrosion areas
Protection of reinforcement adjacent to concrete joints
Localized repairs to beams, columns, undersides, balconies, and other reinforced concrete structures
| Characteristic | Value |
|---|---|
| Zinc mass | 250 g |
| Theoretical capacity | 820 A·h/kg |
| Encapsulation mortar | Cementitious with high alkaline reserve |
| Mortar resistivity | < 10 Ω·m |
| Service life | At least 10 years |
Download the technical data sheet
Monitored anodes
Galvanic cathodic protection of areas, in accordance with EN ISO 12696 and NACE SP0290
BlueSpine monitored anodes are sacrificial zinc anodes activated by a pre-applied coating of lithium-enriched mortar. Installed in boreholes and connected in series within the same anodic zone, they provide galvanic protection for the reinforcement and enable continuous monitoring of the system’s performance.
Monitoring is performed using reference electrodes and depolarization probes connected to a data acquisition system. Data is collected remotely to continuously verify the level of protection for the reinforcing bars, in accordance with the requirements of EN ISO 12696 and NACE SP0290.
Key benefits
Galvanic protection of corroded reinforcements
Continuous monitoring of system performance
Remote verification of the protection level of the reinforcement
Automated acquisition of potential and depolarization data
Available in several sizes to match the zinc coating weight to the structure's geometry and the severity of corrosion
Compliance with EN ISO 12696 and NACE SP0290 standards
Proven track record spanning 20 years
Applications
Treatment of areas affected by diffuse carbonation corrosion
Monitored galvanic cathodic protection of reinforced concrete structures
Long-term monitoring of the protection system's performance
Typical applications: beams, columns, walls, soffits, rafters, and other reinforced concrete elements
| Feature | Value |
|---|---|
| Mortar activation | Lithium-enriched |
| Monitoring | Integrated |
| Service life | At least 20 years |
| Operating temperature | −10 °C to +50 °C |
| Compliance | EN ISO 12696 / NACE SP0290 |
Download the technical data sheet
Why choose BlueSpine sacrificial anodes?
P1
Protection of the armatures without an external power source or periodic maintenance
The galvanic current is generated by the natural electrochemical reaction between the zinc and the steel reinforcing bars. No connection to the power grid, no power cables. Protection is active as soon as the system is installed in the concrete.
P2
Localized repairs must last for at least 10 years
When used in conjunction with localized repairs, ligated anodes ensure that structural repairs will last for at least 10 years. They eliminate the risk of induced corrosion and significantly slow the progression of residual corrosion in the treated areas.
P3
Adjusting the level of protection to the structure's needs
Strung anodes meet the need for localized repairs without the need for dedicated wiring or drilling. Monitored anodes provide a longer-term protection system. They offer continuous monitoring in accordance with standards for projects where the project owner requires traceability of the protection.
P4
Long-term control of active corrosion
Monitored anodes control active corrosion and prevent the formation of new corrosion sites over the service life of the structure. Continuous monitoring of protection parameters ensures compliance with regulatory requirements and allows for the early detection of any deviations before they affect the structure.
In the BlueSpine line
Galvanic anodes are part of a comprehensive ecosystem.
Neurona: remote monitoring
→ Discover Neurona
Measurement sensors
BlueSpine sensors (reference electrodes and depolarization probes) are integrated into the anodic zones to continuously measure the protective potentials. Their number and placement are determined during system design.
→ Learn about sensors
Q-Box: quality control
The BlueSpine Q-Box is the multi-parameter quality control tool used during the installation and provisional commissioning of the system.
→ Discover the Q-Box
FAQ
Your questions, our answers
What is the difference between ligated anodes and monitored anodes?
Ligated anodes are designed to support localized repairs and ensure their long-term durability. Monitored anodes constitute a fully-fledged galvanic cathodic protection system: the integrated monitoring system allows for continuous verification of the protection level and generates the documentation required by current cathodic protection standards. This traceability ensures greater reliability and a demonstrable service life of 20 years, whereas tied anodes are effective for 10-year periods without supervision.
Furthermore, while ligated anodes, as their name suggests, are installed only within repair areas, monitored anodes can be installed in boreholes outside of repair areas. This more widespread installation helps prevent the emergence of new corrosion sites and spares the facility manager the need for additional repair campaigns.
Does the system's design require a specialized engineering firm?
Yes. The system design (number of anodes, spacing, weight per unit area, and definition of anode zones) is carried out by a design office or a certified engineer in accordance with the EN ISO 15257 standard or an equivalent international standard. BlueSpine provides the technical data sheets, electrochemical characteristics, and data necessary for system design.
What is the economic benefit of incorporating anodes during repairs?
Repairs performed without cathodic protection carry a high risk of recurrence: the induced anode effect causes the repaired area to deteriorate in less than 5 years. Incorporating anodes during repairs significantly extends the service life of the repair and reduces the frequency of repair cycles over the long term. The additional installation cost is generally low relative to the structure’s overall life-cycle cost.
Talk to a BlueSpine expert
Reading maps, interpreting results, and guiding further investigations: BlueSpine experts assist engineering firms and diagnostic specialists in analyzing corrosion issues in reinforced concrete structures.
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