CORROSION INVESTIGATION OF STEEL REINFORCEMENTS IN THE PRESENCE OF VARIOUS ADDITIVES AND INHIBITORS

Abstract

The corrosion of steel reinforcement was investigated in the presence of various chloride contents and inhibitors. The corrosion sensitivities of steel reinforcements of ten different qualities were determined via polarization potential measurements. The inhibitor effects of two organosilicon compounds soluble in water were tested in saturated Ca(OHh solu- tions containing chloridein various concentrations. A potassium-methyl-siliconate-based inhibitor was found to reduce the aggressiw effect of chloride. The positive results ob- tained in model solutions were also verified by a test series carried out with concrete specimens. The critical value of chloride ion concentration was determined: up to a chlo- ride content of 2%, a dose of :3% of the tested inhibitor ensures corrosion protection of steel reinforcements of various qualities.