C6h18n4 Behaviour on Reinforcing-Steel Corrosion in Concrete Immersed in 0.5 M H2so4

Okeniyi, Joshua Olusegun; Akinlabi, Esther Titilayo; Ikotun, Jacob Olumuyiwa; Okeniyi, Elizabeth Toyin

doi:10.31788/rjc.2019.1225097

Cited by 3 publications

(1 citation statement)

References 54 publications

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“…In the past decade, numerous studies have deliberated on corrosion problems that are encountered from the in-service environments for steel-reinforced concrete applications [9–30]. These studies lend supports to the knowledge that the environments for steel-reinforced concrete attacks constitute the acidic [9, 12, 16, 30], alkaline [11, 15, 17, 23] and neutral [14, 18, 29] media, wherein environmental agents such as carbonation [20, 25, 28], chloride ions [10, 19, 21, 24], and sulphate ions [9, 13, 17] effects are indicated for the corrosion degradation mechanisms against steel-in-concrete. These have engendered monitoring techniques [26, 27] and solution approaches [20, 22, 29], over the years, for assessing and/or addressing different modes of reinforcing-steel corrosion in concrete.…”

Section: Introductionmentioning

confidence: 99%

Anticorrosion Behaviour ofRhizophora mangleL. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment

Okeniyi

Ikotun

Akinlabi

et al. 2019

The Scientific World Journal

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This paper investigates anticorrosion behaviour of the bark-extract from Rhizophora mangle L. on steel-rebar in concrete slabs in 3.5% NaCl medium of immersion (for simulating saline/marine environment). Corrosion-rate, corrosion-current, and corrosion-potential were measured from the NaCl-immersed steel-reinforced concrete cast with admixture of different plant-extract concentrations and from positive control concrete immersed in distilled water. Analyses indicate excellent mathematical-correlation between the corrosion-rate, concentration of the bark-extract admixture, and electrochemical noise-resistance (ratio of the corrosion-potential standard deviation to that of corrosion-current). The 0.4667% Rhizophora mangle L. bark-extract admixture exhibited optimal corrosion-inhibition performance, η = 99.08±0.11% (experimental) or η = 97.89±0.24% (correlation), which outperformed the positive control specimens, experimentally. Both experimental and correlated results followed Langmuir adsorption isotherm which suggests prevalent physisorption mechanism by the plant-extract on the reinforcing-steel corrosion-protection. These findings support Rhizophora mangle L. bark-extract suitability for corrosion-protection of steel-rebar in concrete structure designed for immersion in the saline/marine environmental medium.

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Section: Introductionmentioning

confidence: 99%

Anticorrosion Behaviour ofRhizophora mangleL. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment

Okeniyi

Ikotun

Akinlabi

et al. 2019

The Scientific World Journal

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Analyses of the Gravimetric and Electrochemical Effects of C₁₆H₁₃N₃O₃ on Mild Steel Corrosion in 0.5 M H₂SO₄

Edoziuno

Odoni

Adediran

et al. 2019

J. Phys.: Conf. Ser.

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This study analyzed the gravimetric and electrochemical effects of C16H13N3O3 (methyl-5-benzoyl-2-benzimidazole carbamate: Mebendazole) on mild steel corrosion in 0.5 M H2SO4, for gaining insights on correlation and significance of differences between the two corrosion-monitoring techniques. For the gravimetric method, weight loss of mild steel specimens immersed in different C16H13N3O3 concentrations mixed in the 0.5 M H2SO4 were obtained for corrosion rates and inhibition efficiencies estimations. For the electrochemical approach, mild steel samples were subjected to potentiodynamic polarization experiments in the different C16H13N3O3 concentrations in 0.5 M H2SO4 that were employed for the gravimetric technique for obtaining instrumental readout of corrosion rate. Results showed that the corrosion rate from the electrochemical experiments exhibited excellent linear correlation (R = 99.91; Nash-Sutcliffe Efficiency = 99.83) with the dataset obtained from the gravimetric corrosion assessments. Both the gravimetric and electrochemical monitoring of mild steel corrosion gave inhibition efficiencies, η > 90%, by the different C16H13N3O3 concentrations for the study. Also, homeoscedastic and heteroscedastic student’s t-test statistics indicated that the differences between the corrosion inhibition efficiencies from the electrochemical and gravimetric techniques were not significant, p-value = 0.9729, but significant for their corrosion rates: 1.52 × 10–6 > p-value > 8.15 × 10–9.

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Modelling Total-corrosion Behaviour of Reinforcing-steel in 3.5% NaCl-immersed Concrete with Cymbopogon citratus leaf-extract admixture

Okeniyi

Joseph

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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In this paper, the total-corrosion behaviour of reinforcing-steel embedment in concrete samples, having Cymbopon citratus (C. citratus) leaf-extract admixture, and which were immersed in 3.5% NaCl (a saline/marine simulating environment) is investigated. Electrochemical data of macrocell current measurements were obtained, as an easy to undertake corrosion monitoring technique, from the steel-reinforced concrete specimens, that had been admixed with different concentrations of the C. citratus leaf-extract, before being immersed in the corrosive test-medium. The obtained data were then rendered to prescribed specification from ASTM G109 for the modelling of the total-corrosion prevailing in the reinforcing-steel within the concrete test-samples. Results obtained showed that C. citratus leaf-extract admixture in the concrete samples led to reduction in the total-corrosion of the reinforcing-steel, and, especially, in agreements with previous works where other types of electrochemical monitoring techniques had been employed.

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C6h18n4 Behaviour on Reinforcing-Steel Corrosion in Concrete Immersed in 0.5 M H2so4

Cited by 3 publications

References 54 publications

Anticorrosion Behaviour ofRhizophora mangleL. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment

Anticorrosion Behaviour ofRhizophora mangleL. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment

Analyses of the Gravimetric and Electrochemical Effects of C₁₆H₁₃N₃O₃ on Mild Steel Corrosion in 0.5 M H₂SO₄

Modelling Total-corrosion Behaviour of Reinforcing-steel in 3.5% NaCl-immersed Concrete with Cymbopogon citratus leaf-extract admixture

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C6h18n4 Behaviour on Reinforcing-Steel Corrosion in Concrete Immersed in 0.5 M H2so4

Cited by 3 publications

References 54 publications

Anticorrosion Behaviour ofRhizophora mangleL. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment

Anticorrosion Behaviour ofRhizophora mangleL. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment

Analyses of the Gravimetric and Electrochemical Effects of C16H13N3O3 on Mild Steel Corrosion in 0.5 M H2SO4

Modelling Total-corrosion Behaviour of Reinforcing-steel in 3.5% NaCl-immersed Concrete with Cymbopogon citratus leaf-extract admixture

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Analyses of the Gravimetric and Electrochemical Effects of C₁₆H₁₃N₃O₃ on Mild Steel Corrosion in 0.5 M H₂SO₄