Sika Ferrogard 720 Reba (MTO)

Description

Sika® FerroGard®-720 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®-720 Reba anodes are placed along the perimeter of the repair area and fixed to the reinforcement prior the application of a concrete repair system. The reinforcement outside the repaired area is at greatest risk owing to the passive condition of the reinforcement within the repaired area. Sika® FerroGard®-720 Reba anodes corrode preferen-tially to the surrounding reinforcement offering protection against incipient anode damage. Sika® FerroGard®-720 Reba can also be placed at specific positions on steel reinforcement stirrups when used in new construction to prevent corrosion in marine environments.

USES

• 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 structures both in and above the tidal zones
• Corrosion prevention in new construction

CHARACTERISTICS AND ADVANTAGES

• Sika® FerroGard®-720 Reba anodes corrode preferen-tially to the surrounding reinforcement, offering pro-tection from further corrosion damage
• Protection against incipient anode effect outside of repaired areas
• No long term maintenance cost
• 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

COLOUR

Zinc anode core surrounded by an activating mortar casing with an integral titanium tie wire on one side.

PACKAGING

25 anodes per box

APPLICATION

Reference must also be made to the full Method Statement which is summarised below:

Control of incipient anodes

Within the repair area where the concrete has been removed,locate the Sika® FerroGard®-720 Reba anodes along the perimeter edges of the repair at spacing’s determined by the design engineer based on the steel density. After pre-soaking the individual Sika® FerroGard®-720 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®-720 Reba anode conductors and the reinforcement must be con-firmed. The Sika® FerroGard®-720 Reba units must be 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 with the repair area once the bridging mortar has stiffened sufficiently to prevent movement of the anodes.

The Sika® FerroGard®-720 Reba anode installation can be monitored using half-cell potential surveys, current outputs and reinforcement corrosion rate measure-ments.

Corrosion prevention in new construction

Sika® FerroGard®-720 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.

Sika® FerroGard®-720 Reba Datasheets

Sika® FerroGard®-720 Reba – Sika’s Website

Colour accuracy disclaimer: We have taken care to display the most accurate visuals of our products. However, we are not responsible for the colour accuracy of the device you are viewing our swatches on. These variations arise due to different computer monitors and devices (make, model and technology, as well as resolution, contrast and brightness control settings) in much the same way a scan will differ from an original image and a colour photocopy. Furthermore, coatings can exhibit variation in perceived colour depending on gloss level and application method. If you require a very specific colour match, please make your selection via actual swatches and colour boards available at our showroom.

Product Disclaimer: Ensure you read all product, technical and safety data sheets prior to application as liability falls on the applicator. All products must be applied in accordance with manufacturer’s recommended method.