Product Data Sheet Show all documents

Sika® FerroGard®-310 Duo

Hybrid anode for corrosion mitigation

Sika® FerroGard®-310 Duo is a zinc based discrete anode which is fixed to corroding reinforcement steel to mitigate chloride and carbonation induced corrosion in reinforced concrete structures. Sika® FerroGard®-310 Duo is a dual technology anode based on the use of a galvanic anode in both an impressed and sacrificial anode function.The complete anode component consists of a cylindrical zinc core covered in an activated coating, separate white spacers and a titanium connecting wire. The anode works in 2 phases: 1st phase - an impressed current is driven from the Sika® FerroGard®-310 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 passive environment during impressed current activation and 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 if required.
  • Cost effective long term durable corrosion control solution.
  • No risk of hydrogen embrittlement (Design dependent).
Product Data Sheet Show all documents

Usage

  • ONLY TO BE APPLIED BY A SIKA NEW ZEALAND APPROVED CONTRACTOR
  • Targeted for global protection of reinforced concrete structures suffering corrosion damage induced by chlorides and/or carbonation.
  • For reinforced and pre-stressed concrete structures such as bridges, car parks, coastal structures, industrial structures and residential high rise. 
 
  • The treatment of prestressed elements, such as bridge beams. This is a unique feature of Sika® FerroGard® Duo anode system as there is no risk of hydrogen embrittlement when designed properly.

Advantages

  • 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 passive environment during impressed current activation and 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 if required.
  • Cost effective long term durable corrosion control solution.
  • No risk of hydrogen embrittlement (Design dependent).

Packaging

25 anodes per box

Colour

Anodes fitted with titanium wire

Product Details

Product Information

Chemical Base

Zinc compound

Shelf Life

5 years from the date of production

Storage Conditions

Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.Do not allow contact with oxidizing materials.

Length

37 mm

Diameter

18 mm

Zinc Weight

60 g
System information

System Structure

Typically density of 3–9 units per m2.

Other sizes of anode are available with different zinc contents and profile:

Name

Zinc content

Sika® FerroGard®-315  Duo

120 g

Sika® FerroGard®-320  Duo190 g
Sika® FerroGard®-325  Duo270 g
Sika® FerroGard®-330  Duo380 g
Technical Information

Charge Capacity

>125 to 1000 kC*

*Dependent on local conditions, including chloride concentration, concrete properties, humidity and temperature.

Application

Application Information

Ambient Air Temperature

+5 °C min

Substrate Temperature

+5 °C min
Application steps

APPLICATION

Reference should also be made to the full Method Statement.

Sika® FerroGard®-310 Duo anodes are installed following guidelines in EN 12696:2012 and CEN/TS 14038-2:2010 (E).

The anodes are typically positioned at a density of 4–9 /m2 of surface concrete.Spacing between anodes: 350–500 mm.

Install into pre-drilled 30 mm diameter holes (depth according to length of anode + 30 mm) using Sika® FerroGard®-300 DuoCrete embedding mortar.

Electrically connect each anode to a feeder wire which runs to the temporary power supply for the impressed current stage of the treatment (typically 1 week). During this period  the anodes will distribute ~50–500 kC/m2 steel surface.

After 1 week remove the feeder wire from the temporary power supply and connect to the reinforcement steel. In this final stage the anodes operate in a galvanic mode, maintaining the steel in a passive state.

The size of each treated area on a structure may be varied to suit the client's requirements.

 

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