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

Omotosho, O. A. and Okeniyi, J. O. and Ajayi, O. O. and Loto, C. A. (2012) Effect of synergies of K2Cr2O7, K2CrO4, NaNO2 and aniline inhibitors on the corrosion potential response of steel reinforced concrete in saline medium. INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCES, 2 (4). pp. 2346-2359. ISSN 0976 – 4402

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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.

Item Type: Article
Uncontrolled Keywords: Reinforced concrete durability, corrosion inhibitors, marine simulating environment, Normal distribution, Weibull distribution, Kolmogorov–Smirnov statistics.
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 26 Feb 2015 11:37
Last Modified: 26 Feb 2015 11:37
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/3597

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