Adsorption behavior and corrosion inhibitive potential of xanthene on mild steel/sulphuric acid interface

N. O. Obi-Egbedi; I. B. Obot

doi:10.1016/j.arabjc.2010.08.004

Adsorption behavior and corrosion inhibitive potential of xanthene on mild steel/sulphuric acid interface

N. O. Obi-Egbedi, I. B. Obot^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

56 Scopus citations

Abstract

The inhibition of xanthene (XEN) on the corrosion of mild steel in 0.5M H₂SO₄ was studied by gravimetric and UV-visible spectrophotometric methods at 303-333K. Results obtained show that XEN act as inhibitor for mild steel in H₂SO₄ solution. The inhibition efficiency was found to increase with increase in XEN concentration but decreased with temperature. Activation parameters and Gibbs free energy for the adsorption process using Statistical Physics were calculated and discussed. The corrosion process in 0.5M H₂SO₄ in the absence and presence of XEN follows zero-order kinetics. The UV-visible absorption spectra of the solution containing the inhibitor after the immersion of mild steel specimen indicate the formation of a XEN-Fe complex. Quantum chemical calculations using DFT were used to calculate some electronic properties of the molecule in order to ascertain any correlation between the inhibitive effect and molecular structure of xanthene.

Original language	English
Pages (from-to)	121-133
Number of pages	13
Journal	Arabian Journal of Chemistry
Volume	5
Issue number	1
DOIs	https://doi.org/10.1016/j.arabjc.2010.08.004
State	Published - Jan 2012
Externally published	Yes

Keywords

Density functional theory (DFT)
Mild steel corrosion inhibitors
Sulphuric acid
Xanthene

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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10.1016/j.arabjc.2010.08.004

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title = "Adsorption behavior and corrosion inhibitive potential of xanthene on mild steel/sulphuric acid interface",

abstract = "The inhibition of xanthene (XEN) on the corrosion of mild steel in 0.5M H2SO4 was studied by gravimetric and UV-visible spectrophotometric methods at 303-333K. Results obtained show that XEN act as inhibitor for mild steel in H2SO4 solution. The inhibition efficiency was found to increase with increase in XEN concentration but decreased with temperature. Activation parameters and Gibbs free energy for the adsorption process using Statistical Physics were calculated and discussed. The corrosion process in 0.5M H2SO4 in the absence and presence of XEN follows zero-order kinetics. The UV-visible absorption spectra of the solution containing the inhibitor after the immersion of mild steel specimen indicate the formation of a XEN-Fe complex. Quantum chemical calculations using DFT were used to calculate some electronic properties of the molecule in order to ascertain any correlation between the inhibitive effect and molecular structure of xanthene.",

keywords = "Density functional theory (DFT), Mild steel corrosion inhibitors, Sulphuric acid, Xanthene",

author = "Obi-Egbedi, \{N. O.\} and Obot, \{I. B.\}",

year = "2012",

month = jan,

doi = "10.1016/j.arabjc.2010.08.004",

language = "English",

volume = "5",

pages = "121--133",

journal = "Arabian Journal of Chemistry",

issn = "1878-5352",

number = "1",

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TY - JOUR

T1 - Adsorption behavior and corrosion inhibitive potential of xanthene on mild steel/sulphuric acid interface

AU - Obi-Egbedi, N. O.

AU - Obot, I. B.

PY - 2012/1

Y1 - 2012/1

N2 - The inhibition of xanthene (XEN) on the corrosion of mild steel in 0.5M H2SO4 was studied by gravimetric and UV-visible spectrophotometric methods at 303-333K. Results obtained show that XEN act as inhibitor for mild steel in H2SO4 solution. The inhibition efficiency was found to increase with increase in XEN concentration but decreased with temperature. Activation parameters and Gibbs free energy for the adsorption process using Statistical Physics were calculated and discussed. The corrosion process in 0.5M H2SO4 in the absence and presence of XEN follows zero-order kinetics. The UV-visible absorption spectra of the solution containing the inhibitor after the immersion of mild steel specimen indicate the formation of a XEN-Fe complex. Quantum chemical calculations using DFT were used to calculate some electronic properties of the molecule in order to ascertain any correlation between the inhibitive effect and molecular structure of xanthene.

AB - The inhibition of xanthene (XEN) on the corrosion of mild steel in 0.5M H2SO4 was studied by gravimetric and UV-visible spectrophotometric methods at 303-333K. Results obtained show that XEN act as inhibitor for mild steel in H2SO4 solution. The inhibition efficiency was found to increase with increase in XEN concentration but decreased with temperature. Activation parameters and Gibbs free energy for the adsorption process using Statistical Physics were calculated and discussed. The corrosion process in 0.5M H2SO4 in the absence and presence of XEN follows zero-order kinetics. The UV-visible absorption spectra of the solution containing the inhibitor after the immersion of mild steel specimen indicate the formation of a XEN-Fe complex. Quantum chemical calculations using DFT were used to calculate some electronic properties of the molecule in order to ascertain any correlation between the inhibitive effect and molecular structure of xanthene.

KW - Density functional theory (DFT)

KW - Mild steel corrosion inhibitors

KW - Sulphuric acid

KW - Xanthene

UR - https://www.scopus.com/pages/publications/82455194916

U2 - 10.1016/j.arabjc.2010.08.004

DO - 10.1016/j.arabjc.2010.08.004

M3 - Article

AN - SCOPUS:82455194916

SN - 1878-5352

VL - 5

SP - 121

EP - 133

JO - Arabian Journal of Chemistry

JF - Arabian Journal of Chemistry

IS - 1

ER -

Adsorption behavior and corrosion inhibitive potential of xanthene on mild steel/sulphuric acid interface

Abstract

Keywords

ASJC Scopus subject areas

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