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, Adebanji Samuel 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 and Resources (2). John Wiley & Sons, Inc., Hoboken, New Jersey, USA, pp. 167-175. ISBN 9781119179856

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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, analyzed 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. © Copyright 2015 by The Minerals, Metals & Materials Society. All rights reserved.

Item Type:	Book Section
Additional Information:	Index key: Composite structures; Concrete slabs; Concretes; Corrosion; Corrosion inhibitors; Efficiency; Extraction; Hazards; Reinforced concrete; Sodium; Sustainable development; Testing; Electrochemical test; Inhibition efficiency; Natural plant extracts; Sodium dichromate; Sustainable corrosion-protection admixture; Test Environment; Plant extracts
Uncontrolled Keywords:	Electrochemical test-measurements analyses; Inhibition efficiency; Natural plant-extract; Saline/marine test-environment; Sodium-dichromate; Sustainable corrosion-protection admixture
Subjects:	Q Science > Q Science (General) Q Science > QA Mathematics Q Science > QC Physics Q Science > QD Chemistry S Agriculture > S Agriculture (General) 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
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 10:00
Last Modified:	15 Aug 2016 10:00
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/6858

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