Transactions of the Indian Institute of Metals

, Volume 67, Issue 6, pp 959–969

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


    • 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

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


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.


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

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© The Indian Institute of Metals - IIM 2014