Product Data Sheet Show all documents

Sika® FerroGard®-515 Patch

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

Sika® FerroGard®-515 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®-515 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®-515 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®-515 Patch is placed in the parent concrete and not within the repair mortar.

  • Sika® FerroGard®-515 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
 
Product Data Sheet Show all documents

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®-515 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
 

Packaging

25 anodes per box, vacuum packed in 5 separate pouches

Colour

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

Product Details

Product Information

Chemical Base

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

85 mm

Diameter

25 mm

Zinc Weight

120 g
System information

System Structure

Sika® FerroGard®-515 Patch

Sika®  FerroGard®-500 Crete

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

Name

Zinc content

Sika® FerroGard®-510 Patch

62 g

Sika® FerroGard®-520 Patch

180 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 full Method Statement which is summarised below:

Within the repair area where the concrete has been removed, locate the Sika® FerroGard®-515 Patch anode along the perimeter edges of the repair at spacing’s determined by the design engineer based on steel density.

Install into pre-drilled 30 mm diameter holes (depth according to length of anode +30 mm) and using Sika® FerroGard®-500 Crete embedding mortar to completely encapsulate the anode.

Directly connect the integrated titanium wire from the anode to an adjacent cleaned area of reinforcement within the repair area by winding at least twice around the reinforcement and fixing the tail with the supplied plastic cable tie.

Electrical continuity of the Sika® FerroGard®-515 Patch anode conducting wire and the reinforcement must be confirmed. The concrete repair mortar must be immediately applied with a suitable Sika® repair mortar.

The Sika® FerroGard®-515 Patch anode installation can be monitored using half-cell potential surveys, current outputs and reinforcement corrosion rate measurements.

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