Anticorrosion Behaviour of Rhizophora mangle L. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment
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...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2019/6894714 |
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| author | Joshua Olusegun Okeniyi Jacob Olumuyiwa Ikotun Esther Titilayo Akinlabi Elizabeth Toyin Okeniyi |
| author_facet | Joshua Olusegun Okeniyi Jacob Olumuyiwa Ikotun Esther Titilayo Akinlabi Elizabeth Toyin Okeniyi |
| author_sort | Joshua Olusegun Okeniyi |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-941d6135594b4e5da443dcb871453871 |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-941d6135594b4e5da443dcb8714538712025-02-03T01:24:27ZengWileyThe Scientific World Journal2356-61401537-744X2019-01-01201910.1155/2019/68947146894714Anticorrosion Behaviour of Rhizophora mangle L. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-EnvironmentJoshua Olusegun Okeniyi0Jacob Olumuyiwa Ikotun1Esther Titilayo Akinlabi2Elizabeth Toyin Okeniyi3Mechanical Engineering Department, Covenant University, Ota 112001, NigeriaDepartment of Civil Engineering and Building, Vaal University of Technology, Vanderbijlpark 1911, South AfricaMechanical Engineering Department, Covenant University, Ota 112001, NigeriaPetroleum Engineering Department, Covenant University, Ota 112001, NigeriaThis 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.http://dx.doi.org/10.1155/2019/6894714 |
| spellingShingle | Joshua Olusegun Okeniyi Jacob Olumuyiwa Ikotun Esther Titilayo Akinlabi Elizabeth Toyin Okeniyi Anticorrosion Behaviour of Rhizophora mangle L. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment The Scientific World Journal |
| title | Anticorrosion Behaviour of Rhizophora mangle L. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment |
| title_full | Anticorrosion Behaviour of Rhizophora mangle L. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment |
| title_fullStr | Anticorrosion Behaviour of Rhizophora mangle L. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment |
| title_full_unstemmed | Anticorrosion Behaviour of Rhizophora mangle L. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment |
| title_short | Anticorrosion Behaviour of Rhizophora mangle L. Bark-Extract on Concrete Steel-Rebar in Saline/Marine Simulating-Environment |
| title_sort | anticorrosion behaviour of rhizophora mangle l bark extract on concrete steel rebar in saline marine simulating environment |
| url | http://dx.doi.org/10.1155/2019/6894714 |
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