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SIKA FerroGard 520 Patch

Discrete anode for corrosion mitigation of incipient anode adjacent to concrete repaired areas

Sika® FerroGard®-520 Patch 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 or carbonation. Sika® FerroGard®-520 Patch 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®-520 Patch anodes corrode preferentially to the surrounding reinforcement offering protection against incipient corrosion damage. In addition, standard repair mortars, bonding primers and reinforcement corrosion protection coatings can be used as Sika® FerroGard®-520 Patch is placed in the parent concrete and not within the repair mortar.

  • Sika® FerroGard®-520 Patch anodes corrode preferentially to the surrounding reinforcement, protecting it from further corrosion damage
  • Protects against incipient anode effect outside of repaired area
  • No long term maintenance costs 

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

Advantages

  • Sika® FerroGard®-520 Patch anodes corrode preferentially to the surrounding reinforcement, protecting it 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 concrete break out
  • Bonding primers for concrete and reinforcement corrosion protection coatings can be used
  • High resistivity repair mortars can be used
  • Performance can be monitored
  • Cost effective corrosion control solution 

Colour

  • Cylindrical zinc core covered in an activated coating, separate white spacers and an integral titanium connecting wire.

Composition

  • Zinc compound

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. Pouches must only be opened when product is required. Any part used pouches must be re-sealed.

Length

  • 120 mm

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