INFLUENCE OF POTASSIUM DICHROMATE-ZN2+ SYSTEM ON CORROSION INHIBITION OF REBAR STEEL IN SIMULATED CONCRETE PORE SOLUTION

Devi Meenakshi S, Rajendran S, Sathiya bama J

Abstract


The inhibition efficiency (IE) of Potassium dichromate - Zn2+ system in controlling corrosion of rebar steel in Simulated Concrete Pore Solution (SCPS) prepared in well water in the absence and presence of Zn2+ has been investigated by mass loss study. It can be seen from the data obtained that formulation consisting of 250 ppm of K2Cr2O7 and 50 ppm of Zn2+ provides 98 % of inhibition efficiency. Inhibition was found to increases with an increasing concentration of Zn2+. Polarization study confirms the formation of inhibitor film formed on the rebar steel surface. The nature of the protective film formed on the rebar steel surface was examined by UV-Visible, FTIR, CV, SEM, Edx and AFM spectral studies. The results obtained shows that the K2Cr2O7 could serve as an effective inhibitor for the corrosion of rebar steel in simulated concrete pore solution.

Keywords


Concrete corrosion, Simulated concrete pore solution, Rebar steel, Potassium dichromate, Well water.

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Copyright (c) 2017 Devi Meenakshi S, Rajendran S, Sathiya bama J

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