International Journal of Environmental Sciences

Volume 2 Issue 4 2012           Pages:2346- 2359

Effect of synergies of K2Cr2O7, K2CrO4, NaNO2 and aniline inhibitors on the corrosion potential response of steel reinforced concrete in saline medium

Author Information:

Omotosho Olugbenga. A  Mechanical Engineering Department, Covenant University, P.M.B.1023, Ota, Nigeri

Okeniyi Joshua. O  Mechanical Engineering Department, Covenant University, P.M.B.1023, Ota, Nigeri

Ajayi Oluseyi. O  Mechanical Engineering Department, Covenant University, P.M.B.1023, Ota, Nigeri

Loto Cleophas. A Mechanical Engineering Department, Covenant University, P.M.B.1023, Ota, Nigeri

ABSTRACT

Studies involving performance of corrosion inhibitors had been identified as one of the critical research needs for improving the durability of concrete structures. This paper investigates the effect of synergy on the performance of potassium chromate, sodium nitrite and aniline as inhibitors on the corrosion of steel-rebar in concrete in sodium chloride medium. The corrosion monitoring technique of the open circuit potential was employed for specimens of steel-reinforced concrete, with different synergistic admixtures of K2Cr2O7, K2CrO4, NaNO2 and Aniline, partially immersed in the marine simulating environment. Interpretation of the statistical modelling of the experimental results, for each of the synergistic concentrations of inhibitor admixtures studied, was done using ASTM C876. The modelled ranking from these predicted the synergistic combination of 3.0g (0.064 M) K2Cr2O7 + 4.5g (0.145M) K2CrO4 + 3.0g (0.272M) NaNO2 + 4ml (0.274M) Aniline as exhibiting optimal inhibiting quality on the corrosion of steel-reinforced concrete in the chloride medium considered.

Keywords: Reinforced concrete durability, corrosion inhibitors, marine simulating environment, Normal distribution, Weibull distribution, Kolmogorov–Smirnov statistics.

DOI: 10.6088/ijes.00202030116


© 2012 Copyright Omotosho Olugbenga. A et al, licensee IPA.This is an open access article distributed under the Creative Commons Attribution License (2.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The electronic version of the article can be downloaded below.

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