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Investigating Solanum Aethiopicum Leaf-Extract and Sodium-Dichromate Effects on Steel-Rebar Corrosion in Saline/Marine Simulating-Environment: Implications on Sustainable Alternative for Environmentally-Hazardous Inhibitor

Okeniyi, Joshua Olusegun and Ogbiye, S. A. and Ogunlana, Olubanke Olujoke and Okeniyi, Elizabeth Toyin and Ogunlana, Oluseyi Ebenezer (2015) Investigating Solanum Aethiopicum Leaf-Extract and Sodium-Dichromate Effects on Steel-Rebar Corrosion in Saline/Marine Simulating-Environment: Implications on Sustainable Alternative for Environmentally-Hazardous Inhibitor. In: Engineering Solutions for Sustainability: Materials & Resources (ESS: M&R), 2015.

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Abstract

This paper investigates Solanum aethiopicum leaf-extract and the well-known but environmentally-hazardous sodium-dichromate inhibitor effects on concrete steel-rebar corrosion in 3.5% NaCl medium (simulating saline/marine environment). Different equal-concentration models (wt% cement) of the natural-plant leaf-extract and of sodium-dichromate were admixed in steel-reinforced concrete slabs from which electrochemical test-measurements were obtained for comparing admixture performance. Test-results, analysed as per ASTM G16-95 R04, showed that only the 0.083% sodium-dichromate admixture outperformed the 0.083% Solanum aethiopicum leaf-extract in corrosion inhibition effectiveness. The other natural-plant leaf-extract exhibited better inhibition-efficiency performance than their equal-concentration models of sodium-dichromate. The 0.25% Solanum aethiopicum leaf-extract exhibited optimal performance, η = 98.28%, at inhibiting steel-rebar corrosion among the also effective different concentrations of the plant-extract and of sodium-dichromate admixtures employed. These and phytochemical test-results bare indications that Solanum aethiopicum leaf-extract is a suitable, sustainable and eco-friendly alternative for the environmentally-hazardous sodium-dichromate inhibitor of steel-rebar corrosion in concrete designed for saline/marine environments.

Item Type: Conference or Workshop Item (Paper)
Subjects: Q Science > QH Natural history > QH301 Biology
T Technology > TJ Mechanical engineering and machinery
T Technology > TP Chemical technology
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Faculty of Medicine, Health and Life Sciences > School of Biological Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 25 Jun 2018 14:15
Last Modified: 25 Jun 2018 14:15
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/11039

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