relation: http://eprints.covenantuniversity.edu.ng/10653/
title: Performance of Rhizophora mangle L. leaf-extract and sodium dichromate synergies on steel reinforcement corrosion in 0.5 M H2SO4-immersed concrete
creator: Okeniyi, Joshua Olusegun
creator: Loto, C. A.
creator: Popoola, A. P. I.
creator: Omotosho, Olugbenga Adeshola
subject: T Technology (General)
subject: TJ Mechanical engineering and machinery
description: This paper investigates performance of different synergistic combinations of Rhizophora mangle L leafextract  and sodium dichromate (Na2Cr2O7) admixtures on the corrosion of steel-reinforcement in 0.5 M  H2SO4-immersed concrete. Steel-reinforcement corrosion, in concrete slabs partially-immersed in the  microbial/industrial simulating test-environment, were assessed using non-destructive electrochemical  measurements of corrosion rate (CR) and open circuit potential (OCP) . Probability distribution function  (pdf) analyses, as prescribed by ASTM G16-95 R04, of the scatter of corrosion test-data showed that  while datasets of OCP distributed like the Normal, the Gumbel and Weibull pdf’s, the datasets of CR  were best fitted by the Weibull pdf. Results identified 6 g Rhizophora mangle L leaf-extract + 2 g  Na2Cr2O7 synergistic admixture with both optimal inhibition efficiency, η = 90.12%, and synergistic  parameter that indicated excellent synergistic interaction of the plant-extract with Na2Cr2O7 chemical.That this synergistic admixture out-performed the also effective Na2Cr2O7 admixtures in the study suggests suitability of Rhizophora mangle L leaf-extract as eco-friendly replacement of toxic Na2Cr2O7 inhibitor in H2SO4-immersed steel-reinforced concrete. This is potent with the advantage of reducing environmental effect from lower Na2Cr2O4 usage for controlling corrosion in steel-reinforced concretes  for the microbial/industrial environment.
date: 2015
type: Conference or Workshop Item
type: PeerReviewed
format: application/pdf
language: en
identifier: http://eprints.covenantuniversity.edu.ng/10653/1/PerformanceofRhizophoraMangleL.Leaf-ExtractandSodiumDichromateSynergiesonSteel-reinforcementCorrosionin0.5MHSO-ImmersedConcretebyOkeniyietal2015NACE.pdf
identifier:   Okeniyi, Joshua Olusegun and Loto, C. A. and Popoola, A. P. I. and Omotosho, Olugbenga Adeshola  (2015) Performance of Rhizophora mangle L. leaf-extract and sodium dichromate synergies on steel reinforcement corrosion in 0.5 M H2SO4-immersed concrete.  In: CORROSION 2015 CONFERENCE & EXPO.