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Effect of NaNO2 and C6H15NO3 Synergistic Admixtures on Steel-Rebar Corrosion in Concrete Immersed in Aggressive Environments

Okeniyi, Joshua Olusegun and Popoola, Abimbola Patricia Idowu and Loto, Cleophas Akintoye and Omotosho, Olugbenga Adeshola and Okpala, Stanley Okechukwu and Ambrose, Idemudia Joshua (2015) Effect of NaNO2 and C6H15NO3 Synergistic Admixtures on Steel-Rebar Corrosion in Concrete Immersed in Aggressive Environments. Advances in Materials Science and Engineering, 2015. pp. 1-11. ISSN 1687-8434

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Abstract

This paper studies effect of different combinations of NaNO2 (sodium nitrite) and C6H15NO3 (triethanolamine (TEA)), as synergistic admixtures in concrete immersed in NaCl and in H2SO4 test environments, on the corrosion of the concrete reinforcing steel (rebar). Although statistically analysed electrochemical test results confirmed NaNO2 effectiveness, synergistic combinations of 4 g NaNO2 + 4 g C6H15NO3 in NaCl medium and of 2 g NaNO2 + 6 g C6H15NO3 in H2SO4 medium were also highly effective at inhibiting rebar corrosion. Synergistic parameter analyses showed that the effective synergistic admixtures that inhibited concrete steel-rebar corrosion in their respective medium were the NaNO2 and C6H15NO3 combinations that exhibited synergistic interactions of cooperative adsorption on steel-rebar. These support the suitability of requisite concentration of triethanolamine as additive admixture with sodium nitrite for steel-rebar corrosion mitigation, which is potent with reduced environmental effects, in concrete immersed in NaCl and in H2SO4 corrosive media. © 2015 Joshua Olusegun Okeniyi et al.

Item Type: Article
Additional Information: Academic Editor: Richard Hennig
Uncontrolled Keywords: Concretes; Corrosion; Corrosion inhibitors; Ethanolamines; Sodium; Triethanolamine; Aggressive environment; Concrete reinforcing; Electrochemical test; Parameter analysis; Rebar corrosion; Synergistic combinations; Synergistic interaction; Triethanolamines; Concrete additives
Subjects: Q Science > Q Science (General)
Q Science > QA Mathematics
Q Science > QC Physics
Q Science > QD Chemistry
T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TD Environmental technology. Sanitary engineering
T Technology > TH Building construction
T Technology > TJ Mechanical engineering and machinery
T Technology > TP Chemical technology
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment
Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Faculty of Engineering, Science and Mathematics > School of Mathematics
Faculty of Engineering, Science and Mathematics > School of Physics
Depositing User: Dr Joshua Olusegun Okeniyi
Date Deposited: 15 Aug 2016 10:31
Last Modified: 15 Aug 2016 10:31
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/6865

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