Whether due to moisture, carbonation or chlorination,
concrete corrosion involves the same electrochemical phenomena: reduced
concrete pH, the occurrence of a battery effect in reinforcements leading
to oxidation at the anode (+ pole) and a protective effect through electron
influx at the cathode (- pole). This phenomenon is the very principle behind
the so-called cathodic protection solutions developed by Freyssinet under
the Foreva® label. These solutions consist of installing or creating anodes
near the reinforcements to artificially make them behave like cathodes.
They include Foreva® GP Zinc, which consists of using a plasma torch to
apply a fine layer of zinc to the concrete, linked at intervals to the
reinforcements by a system of stainless steel plates and rods, in order
to act as an anode. A pore-blocking coating is applied after the metal
spraying operation, making it possible to apply a coloured finishing coat.
This solution is designed for use on structures built on the sea front
in particular, and provides protection for over 30 years.
Foreva® GP Zinc |