Electrochemical Performance of Anthocleista djalonensis on Steel-Reinforcement Corrosion in Concrete Immersed in Saline/Marine Simulating-Environment

Joshua Olusegun Okeniyi; Cleophas Akintoye Loto; Abimbola Patricia Idowu Popoola

doi:10.1007/s12666-014-0424-5

Transactions of the Indian Institute of Metals

December 2014, Volume 67, Issue 6, pp 959–969

Electrochemical Performance of Anthocleista djalonensis on Steel-Reinforcement Corrosion in Concrete Immersed in Saline/Marine Simulating-Environment

Authors

Joshua Olusegun Okeniyi
Email author
- Mechanical Engineering DepartmentCovenant University
Cleophas Akintoye Loto
- Mechanical Engineering DepartmentCovenant University
- Chemical, Metallurgical and Materials Engineering DepartmentTshwane University of Technology
Abimbola Patricia Idowu Popoola
- Chemical, Metallurgical and Materials Engineering DepartmentTshwane University of Technology

Technical Paper

First Online:: 15 May 2014

Received:: 05 February 2014
Accepted:: 09 April 2014

DOI: 10.1007/s12666-014-0424-5

Cite this article as:: Okeniyi, J.O., Loto, C.A. & Popoola, A.P.I. Trans Indian Inst Met (2014) 67: 959. doi:10.1007/s12666-014-0424-5

Abstract

In this paper, electrochemical techniques were employed to study performance of different concentrations of Anthocleista djalonensis leaf-extract admixtures on the corrosion of steel-reinforcement in concrete immersed in 3.5 % NaCl, for simulating saline/marine environment. Analysed test-results showed that the corrosion rate correlated directly with admixture concentration and inversely with cube of the ratio of standard deviations of corrosion potential and corrosion current. The 0.4167 % A. djalonensis (per weight of cement) exhibited optimal inhibition efficiency, η = 97.43 ± 1.20 %, from analysed experimental data, or 94.80 ± 3.39 %, from predicted correlation model, on steel-reinforcement corrosion in the medium. The other admixture concentrations also exhibited high efficiencies at inhibiting steel-reinforcement corrosion in the chloride contaminated environment. Isotherm fittings of the experimental and predicted performance suggest that they both obeyed the Langmuir adsorption model. Evaluated parameters from the isotherm model indicated favourable adsorption and predominant chemisorption mechanism by this environmentally-friendly inhibitor of steel-reinforcement corrosion in the saline/marine simulating-environment.

Keywords

Steel-rebar corrosionSaline/marine environmentGreen-inhibitorElectrochemical techniquesCorrelation analysesInhibition efficiency

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Electrochemical Performance of Anthocleista djalonensis on Steel-Reinforcement Corrosion in Concrete Immersed in Saline/Marine Simulating-Environment

Authors

Abstract

Keywords

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