Sika® FerroGard®-325 Duo
Hybrid anode for corrosion mitigation
Sika® FerroGard®-325 Duo is a zinc based discrete sacrificial anode placed outside concrete repaired areas in reinforced concrete structures which are corroding as a result of chloride ingress.
Sika® FerroGard®-325 Duo is a dual technology anode based on the use of a galvanic anode in both an impressed and sacrificial anode function
Sika® FerroGard®-325 Duo discrete anodes are placed into sound chloride contaminated concrete outside of any concrete repaired areas.
The anode works in 2 phases:
1st phase - an impressed current is driven from the Sika® FerroGard®-325 Duo anode to the steel using a temporary power supply. During this stage, the reinforcement’s passive film is strengthened and aggressive ions are drawn away.
2nd phase - at the end of the 1st phase the power is removed. The anode then acts as a long term sacrificial anode preventing further corrosion.
- No long term power supply needed
- A variety of sizes to suit the structure and life expectancy
- Initially delivers an impressed current using a temporary power supply
- Creates a passive environment during impressed current activation, draws aggressive ions to the anode and the passive film is strengthened around the reinforcement.
- Acts as a sacrificial anode without the requirement for an external power supply
- No long term maintenance
- Further passivating charge can be applied if required.
- Minimal long term costs
- Performance can be monitored
- Cost effective long term durable corrosion control solution
- No risk of hydrogen embrittlement ( Design dependant)