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The cathodic corrosion protection is realized by an electric connection of
the zinc anode (spray coating) with the steel reinforcement. The electric
circuit is closed by the concrete serving as an electrolyte. The anodic
partial reaction of iron dissolution is prevented by the countercurrent
produced.
Chlorides and hydroxides migrate from the cathode (reinforcement) to the
anode (zinc coating). The service life of the zinc coating can be
considerably extended by applying an additional organic coat to the zinc
coating.
This corrosion protection system in the meantime patented worldwide
is applicable for all reinforced concrete structures and was developed by
Grillo-Werke AG
in 1997 also for especially aggressive environmental conditions. It is
marketed under the name of GRILLO-KKS-Beton.
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