A brief classification to new corrosion inhibitors in reinforced concrete

Corrosion of reinforcing steel represents the most widespread form of deterioration of concrete structures resulting in significant costs for repair and replacement worldwide. Despite the huge demand, a simple, cheap and reliable technique that either protects the steel in concrete from corrosion or at least lowers its corrosion rate is still lacking. The concrete repair industry has developed novel techniques that are claimed to prevent the steel from corrosion and/or to restore the protective character of the cover concrete by introducing corrosion inhibitors into the carbonated or chloride contaminated concrete. Inhibitors, chemical substances that prevent or retard corrosion, are applied as concrete admixtures or as surface applied liquids either for preventive or for restorative applications.