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Sika® FerroGard®-710 Reba

Discrete anode for corrosion mitigation of incipient anode adjacent to concrete repaired areas and for corrosion prevention in new construction

Sika® FerroGard®-710 Reba is a zinc based discrete sacrificial anode placed inside a concrete repaired area in reinforced concrete structures which are corroding as a result of chloride ingress. Sika® FerroGard®-710 Reba anodes are placed along the perimeter of the repair area and fixed to the reinforcement prior to the application of a concrete repair system. The reinforcement outside the repaired area is at greatest corrosion risk owing to the passive condition of the reinforcement within the repaired area. Sika® FerroGard®-710 Reba anodes corrode preferentially to the surrounding reinforcement offering protection against incipient corrosion damage. Sika® FerroGard®-710 Reba can also be placed at specific positions on steel reinforcement stirrups when used in new construction to prevent corrosion in marine environments.

  • Sika® FerroGard®-710 Reba anodes corrode preferentially to the surrounding reinforcement, offering protection from further corrosion damage
  • Protects against incipient anode effect outside of repaired area
  • No long term maintenance costs 
  • Strengthens passive film on reinforcement
  • No rapid dissolution of activating components
  • Quick installation—no additional break out
  • Performance can be monitored
  • Cost effective corrosion control solution
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Usage

  • Controlling the incipient anode effect by electrically balancing the anodic and cathodic areas of reinforcement
 
  • Targeted treatment applied to concrete repaired areas to prevent incipient corrosion damage
  • For reinforced concrete structures such as bridges, car parks, coastal structures, industrial structures and residential high rise
  • Coastal reinforced concrete structures both in and above the tidal zone
  • Corrosion prevention in new construction

Advantages

  • Sika® FerroGard®-710 Reba anodes corrode preferentially to the surrounding reinforcement, offering protection from further corrosion damage
  • Protects against incipient anode effect outside of repaired area
  • No long term maintenance costs 
  • Strengthens passive film on reinforcement
  • No rapid dissolution of activating components
  • Quick installation—no additional break out
  • Performance can be monitored
  • Cost effective corrosion control solution

Packaging

25 anodes per box

Colour

Zinc anode core surrounded by an activating mortar casing  with two integral conducting tie wires

Product Details

Product Information

Composition

Zinc alloy compound and mortar casing of pH >14

Shelf life

5 years from 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

65 mm

Width

60 mm

Thickness

35 mm

Zinc Weight

60 g
System information

System Structure

  • Sika® FerroGard®-710 Reba

Other anode sizes are available with different zinc contents: 

Name

Zinc content

Sika® FerroGard®-715 Reba

100 g

Sika® FerroGard®-720 Reba

165 g
Technical Information

Current Density

>0,2–2 mA/m2* in corrosive environment

*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 must also be made to the relevant Method Statements which are summarised below:

Control of incipient anodes

Within the repair area where the concrete has been removed, locate the Sika® FerroGard®-710 Reba anode along the perimeter edges of the repair at spacing’s determined by the design engineer based on steel density.

After pre-soaking the individual Sika® FerroGard®-710 Reba anodes, they are attached parallel or beneath the cleaned reinforcement in the location of the anodes using the conducting tie wires.

Electrical continuity of the Sika® FerroGard®-710 Reba anode conductors and the reinforcement must be confirmed. The Sika® FerroGard®-710 Reba units must then be encased in the relevant Sika® low resistivity bridging mortar ensuring complete coverage of the anode surface. The appropriate Sika® concrete repair system is then applied within the repair area once the bridging mortar has stiffened sufficiently to prevent movement of the anode.

The Sika® FerroGard®-710 Reba anode installation can be monitored using half-cell potential surveys, current outputs and reinforcement corrosion rate measurements.

Corrosion prevention in new construction

Sika® FerroGard®-710 Reba anodes are attached to the reinforcement by the integral tie wires at regular spacing’s (refer to the Method Statement). They must be properly fixed to the bar with additional plastic tie wires to prevent the anodes being displaced during concrete casting.

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