PROTECTION EFFICIENCY OF MIGRATING INHIBITORS ON CORROSION OF REINFORCING STEEL IN AGGRESSIVE ENVIRONMENT

Abstract

The migration corrosion inhibitors (MCI) are regarded as an efficient method for inhibiting and retarding the corrosion of the reinforcement and the concrete structure. Our study concerns the investigation of the protective effect of MCI; different concentrations of butanol-1 amin-2 refer 1g/L lysine in sulfuric acid in presence of chloride ions, in form of NaCl (H2SO4 1M + Cl- 10-3M). The potentiodynamic polarization method is conducted to measure corrosion rate and inhibition efficiency of two kinds of low allow carbon steel marked as: Steel 39, Steel 44. Potentiodynamic polarization measurements showed that the presence of MCI in acidic solution decreases the corrosion current to a good extent. The polarization curves in polarization experiments show that the inhibition efficiency is 90.52% with 12 g/L butanol-1 amin-2 + 1g/L lysine concentration of inhibitor, referring steel 39 and 75.98% inhibition efficiency for steel 44.