Gravimetric, electrochemical surface and density functional theory study of acetohydroxamic and benzohydroxamic acids as corrosion inhibitors for copper in 1 M HCl

Gravimetric, electrochemical surface and density functional theory study of acetohydroxamic and benzohydroxamic acids as corrosion inhibitors for copper in 1 M HCl

The inhibition effect of acetohydroxamic acid (AHA) and benzohydroxamic acid (BHA) on corrosive dissolution of copper in 1 M HCl medium was studied using gravimetric, electrochemical (PDP and EIS), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive...

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Main Authors: Dakeshwar Kumar Verma, Eno E. Ebenso, M.A. Quraishi, Chandrabhan Verma
Format: Article
Language:English
Published: Elsevier 2019-06-01
Series:Results in Physics
Online Access:http://www.sciencedirect.com/science/article/pii/S221137971930230X
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spelling doaj-88472f63659e4d9290d4063315f694e32020-11-25T01:13:04ZengElsevierResults in Physics2211-37972019-06-0113Gravimetric, electrochemical surface and density functional theory study of acetohydroxamic and benzohydroxamic acids as corrosion inhibitors for copper in 1 M HClDakeshwar Kumar Verma0Eno E. Ebenso1M.A. Quraishi2Chandrabhan Verma3Department of Chemistry, Government Digvijay Autonomous Postgraduate College, Rajnandgaon (C. G.) 491441, IndiaDepartment of Chemistry, School of Chemical and Physical Sciences, Faculty of Natural and Agricultural Sciences, North-West University, Private BagX2046, Mmabatho 2735, South Africa; Material Science Innovation & Modelling (MaSIM) Research Focus Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Bag X2046, Mmabatho 2735, South Africa; Corresponding authors at: Department of Chemistry, School of Chemical and Physical Sciences, Faculty of Natural and Agricultural Sciences, North-West University, Private BagX2046, Mmabatho 2735, South Africa.Center of Research Excellence in Corrosion, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi ArabiaDepartment of Chemistry, School of Chemical and Physical Sciences, Faculty of Natural and Agricultural Sciences, North-West University, Private BagX2046, Mmabatho 2735, South Africa; Material Science Innovation & Modelling (MaSIM) Research Focus Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Bag X2046, Mmabatho 2735, South Africa; Corresponding authors at: Department of Chemistry, School of Chemical and Physical Sciences, Faculty of Natural and Agricultural Sciences, North-West University, Private BagX2046, Mmabatho 2735, South Africa.The inhibition effect of acetohydroxamic acid (AHA) and benzohydroxamic acid (BHA) on corrosive dissolution of copper in 1 M HCl medium was studied using gravimetric, electrochemical (PDP and EIS), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and density functional theory (DFT) methods. Inhibition efficiencies of AHA and BHA are increases on increasing their concentrations and decreases as temperature increased. Results showed that AHA and BHA acted as mixed type inhibitors. The BHA and AHA exhibited the maximum efficiencies of 98.49%and AHA 95.90% respectively. Adsorption of the BHA and AHA obeyed the Langmuir adsorption isotherm model. Gibbs free energy of adsorption (ΔGads), adsorption constant (Kads) and activation energy (Ea) values showed that both BHA and AHA strongly and spontaneously adsorbed on the metal (copper) surface/electrolyte interfaces. The gravimetric and electrochemical studies were supported by EDS coupled SEM analyses. Inhibitive properties of BHA and AHA obtained from experimental methods was supported by DFT. Numerous parameters were computed and discussed in order to described their adsorption behaviour. Keywords: Acid corrosion, Copper, Density functional theory, Organic inhibitors, SEM-EDS, Mixed type, Adsorption isothermhttp://www.sciencedirect.com/science/article/pii/S221137971930230X
collection DOAJ
language English
format Article
sources DOAJ
author Dakeshwar Kumar Verma
Eno E. Ebenso
M.A. Quraishi
Chandrabhan Verma
spellingShingle Dakeshwar Kumar Verma
Eno E. Ebenso
M.A. Quraishi
Chandrabhan Verma
Gravimetric, electrochemical surface and density functional theory study of acetohydroxamic and benzohydroxamic acids as corrosion inhibitors for copper in 1 M HCl
Results in Physics
author_facet Dakeshwar Kumar Verma
Eno E. Ebenso
M.A. Quraishi
Chandrabhan Verma
author_sort Dakeshwar Kumar Verma
title Gravimetric, electrochemical surface and density functional theory study of acetohydroxamic and benzohydroxamic acids as corrosion inhibitors for copper in 1 M HCl
title_short Gravimetric, electrochemical surface and density functional theory study of acetohydroxamic and benzohydroxamic acids as corrosion inhibitors for copper in 1 M HCl
title_full Gravimetric, electrochemical surface and density functional theory study of acetohydroxamic and benzohydroxamic acids as corrosion inhibitors for copper in 1 M HCl
title_fullStr Gravimetric, electrochemical surface and density functional theory study of acetohydroxamic and benzohydroxamic acids as corrosion inhibitors for copper in 1 M HCl
title_full_unstemmed Gravimetric, electrochemical surface and density functional theory study of acetohydroxamic and benzohydroxamic acids as corrosion inhibitors for copper in 1 M HCl
title_sort gravimetric, electrochemical surface and density functional theory study of acetohydroxamic and benzohydroxamic acids as corrosion inhibitors for copper in 1 m hcl
publisher Elsevier
series Results in Physics
issn 2211-3797
publishDate 2019-06-01
description The inhibition effect of acetohydroxamic acid (AHA) and benzohydroxamic acid (BHA) on corrosive dissolution of copper in 1 M HCl medium was studied using gravimetric, electrochemical (PDP and EIS), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and density functional theory (DFT) methods. Inhibition efficiencies of AHA and BHA are increases on increasing their concentrations and decreases as temperature increased. Results showed that AHA and BHA acted as mixed type inhibitors. The BHA and AHA exhibited the maximum efficiencies of 98.49%and AHA 95.90% respectively. Adsorption of the BHA and AHA obeyed the Langmuir adsorption isotherm model. Gibbs free energy of adsorption (ΔGads), adsorption constant (Kads) and activation energy (Ea) values showed that both BHA and AHA strongly and spontaneously adsorbed on the metal (copper) surface/electrolyte interfaces. The gravimetric and electrochemical studies were supported by EDS coupled SEM analyses. Inhibitive properties of BHA and AHA obtained from experimental methods was supported by DFT. Numerous parameters were computed and discussed in order to described their adsorption behaviour. Keywords: Acid corrosion, Copper, Density functional theory, Organic inhibitors, SEM-EDS, Mixed type, Adsorption isotherm
url http://www.sciencedirect.com/science/article/pii/S221137971930230X
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