Corrosion Inhibition Using Harmal Leaf Extract as an Eco-Friendly Corrosion Inhibitor

Extract of natural plants is one of the most important metallic corrosion inhibitors. They are readily available, nontoxic, environmentally friendly, biodegradable, highly efficient, and renewable. The present project focuses on the corrosion inhibition effects of Peganum Harmala leaf extract. The e...

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Autores principales:	Nasreen Al Otaibi, Hassan H. Hammud
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Harmal leaves anticorrosion equivalent electrical circuit EIS Tafel Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/92b9653dfcfa4c29b439dbaca1132629
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spelling	oai:doaj.org-article:92b9653dfcfa4c29b439dbaca11326292021-11-25T18:29:17ZCorrosion Inhibition Using Harmal Leaf Extract as an Eco-Friendly Corrosion Inhibitor10.3390/molecules262270241420-3049https://doaj.org/article/92b9653dfcfa4c29b439dbaca11326292021-11-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/22/7024https://doaj.org/toc/1420-3049Extract of natural plants is one of the most important metallic corrosion inhibitors. They are readily available, nontoxic, environmentally friendly, biodegradable, highly efficient, and renewable. The present project focuses on the corrosion inhibition effects of Peganum Harmala leaf extract. The equivalent circuit with two time constants with film and charge transfer components gave the best fitting of impedance data. Extraction of active species by sonication proved to be an effective new method to extract the inhibitors. High percent inhibition efficacy IE% of 98% for 283.4 ppm solutions was attained using impedance spectroscopy EIS measurements. The values of charge transfer <i>R</i><sub>ct</sub> increases while the double layer capacitance <i>C</i><sub>dl</sub> values decrease with increasing Harmal extract concentration. This indicates the formation of protective film. The polarization curves show that the Harmal extract acts as a cathodic-type inhibitor. It is found that the adsorption of Harmal molecules onto the steel surface followed Langmuir isotherm. Fourier-transform infrared spectroscopy FTIR was used to determine the electron-rich functional groups in Harmal extract, which contribute to corrosion inhibition effect. Scanning electron microscopy SEM measurement of a steel surface clearly proves the anticorrosion effect of Harmal leaves.Nasreen Al OtaibiHassan H. HammudMDPI AGarticleHarmal leavesanticorrosionequivalent electrical circuitEISTafelOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 7024, p 7024 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Harmal leaves anticorrosion equivalent electrical circuit EIS Tafel Organic chemistry QD241-441
spellingShingle	Harmal leaves anticorrosion equivalent electrical circuit EIS Tafel Organic chemistry QD241-441 Nasreen Al Otaibi Hassan H. Hammud Corrosion Inhibition Using Harmal Leaf Extract as an Eco-Friendly Corrosion Inhibitor
description	Extract of natural plants is one of the most important metallic corrosion inhibitors. They are readily available, nontoxic, environmentally friendly, biodegradable, highly efficient, and renewable. The present project focuses on the corrosion inhibition effects of Peganum Harmala leaf extract. The equivalent circuit with two time constants with film and charge transfer components gave the best fitting of impedance data. Extraction of active species by sonication proved to be an effective new method to extract the inhibitors. High percent inhibition efficacy IE% of 98% for 283.4 ppm solutions was attained using impedance spectroscopy EIS measurements. The values of charge transfer <i>R</i><sub>ct</sub> increases while the double layer capacitance <i>C</i><sub>dl</sub> values decrease with increasing Harmal extract concentration. This indicates the formation of protective film. The polarization curves show that the Harmal extract acts as a cathodic-type inhibitor. It is found that the adsorption of Harmal molecules onto the steel surface followed Langmuir isotherm. Fourier-transform infrared spectroscopy FTIR was used to determine the electron-rich functional groups in Harmal extract, which contribute to corrosion inhibition effect. Scanning electron microscopy SEM measurement of a steel surface clearly proves the anticorrosion effect of Harmal leaves.
format	article
author	Nasreen Al Otaibi Hassan H. Hammud
author_facet	Nasreen Al Otaibi Hassan H. Hammud
author_sort	Nasreen Al Otaibi
title	Corrosion Inhibition Using Harmal Leaf Extract as an Eco-Friendly Corrosion Inhibitor
title_short	Corrosion Inhibition Using Harmal Leaf Extract as an Eco-Friendly Corrosion Inhibitor
title_full	Corrosion Inhibition Using Harmal Leaf Extract as an Eco-Friendly Corrosion Inhibitor
title_fullStr	Corrosion Inhibition Using Harmal Leaf Extract as an Eco-Friendly Corrosion Inhibitor
title_full_unstemmed	Corrosion Inhibition Using Harmal Leaf Extract as an Eco-Friendly Corrosion Inhibitor
title_sort	corrosion inhibition using harmal leaf extract as an eco-friendly corrosion inhibitor
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/92b9653dfcfa4c29b439dbaca1132629
work_keys_str_mv	AT nasreenalotaibi corrosioninhibitionusingharmalleafextractasanecofriendlycorrosioninhibitor AT hassanhhammud corrosioninhibitionusingharmalleafextractasanecofriendlycorrosioninhibitor
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Corrosion Inhibition Using Harmal Leaf Extract as an Eco-Friendly Corrosion Inhibitor

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