EFFECT OF CHLORIDE IONS OF SALINE MEDIA ON CORROSION RATE OF CARBON STEEL IN SIMULATED CONCRETE SOLUTION

In this study the corrosion behaviors of carbon steel (CS) in simulated concrete solution (KOH, NaOH, Ca(OH)₂) was investigated. Current density of corrosion (i_corr), potential of corrosion (E_a), anodic and cathodic Tafel slopes (β_a, β_c) were used to determine the resistance of polarization (Rp). The result indicated that the temperature increasing of the concrete electrolyte has slightly increased the  rate of corrosion for the CS .This study also showed that the corrosion current of the polarized of CSRBs always increased linearly with chloride concentration in the rang 0.5 to 4.5% NaCl, the corrosion current are between 27 and 98 x10^-6 A/cm² for CS, these the corrosion rate values were not too high in comparison with the rates of the electrolyte free of chloride ions (25 – 62 x10^-6 A/cm²).