Okeniyi, Joshua Olusegun and Ambrosee, Idemudia Joshua and Oladele, Isaac Oluwaseun and Loto, C. A. and Popoola, Patricia Abimbola Idowu (2013) Electrochemical performance of sodium dichromate partial replacement models by triethanolamine admixtures on steel-rebar corrosion in concretes. International Journal of Electrochemical Science, 8 (8). pp. 10758-10771. ISSN 14523981
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This paper studies electrochemical performance of partial replacement models of sodium dichromate (Na2Cr2O7) inhibitor by triethanolamine (C6H15NO3) admixtures on the corrosion of steel-rebar embedded in concrete immersed in corrosive environments. For these, 3.5% NaCl and 0.5M H2SO4 media were employed for respectively simulating saline/marine and industrial/microbial corrosive test-environments. Test-results of electrochemical monitoring techniques were subjected to statistical modelling of probability distribution fittings, goodness-of-fit tests and analyses for detailing admixture performance in steel-reinforced concretes. Results from these identified 6 g Na2Cr2O7 + 2 g C6H15NO3 and the 2 g Na2Cr2O7 + 6 g C6H15NO3 partial Na2Cr2O7 replacement admixtures with excellent inhibition efficiencies, η = 91.7% and η = 90.0%, respectively in the NaCl-immersed concretes. Also, the 2 g Na2Cr2O7 + 6 g C6H15NO3 exhibited inhibition efficiency η = 52.5% that lagged behind η = 72.0% of 8 g Na2Cr2O7 but which both represent good efficiency criteria in the H2SO4-immersed concretes. © 2013 by ESG.
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