Electrochemical study of corrosion inhibition and adsorption behaviour for pure iron by polyacrylamide in H2SO4: Synergistic effect of iodide ions

S. A. Umoren; Y. Li; F. H. Wang

doi:10.1016/j.corsci.2010.01.026

Electrochemical study of corrosion inhibition and adsorption behaviour for pure iron by polyacrylamide in H₂SO₄: Synergistic effect of iodide ions

S. A. Umoren
, Y. Li^*
, F. H. Wang

^*Corresponding author for this work

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

197 Scopus citations

Abstract

Corrosion inhibition and adsorption behaviour for pure iron in 0.5 M H₂SO₄ by polyacrylamide (PA) were investigated using electrochemical techniques. The effect of iodide ion additives was also studied. It was found that inhibition efficiency increased with PA concentration. Corrosion inhibition was afforded by adsorption of PA onto the metal following El-Awady kinetic-thermodynamic adsorption isotherm model via chemisorption mechanism. A mixed inhibition mechanism is proposed for the inhibitive effects of PA as revealed by potentiodynamic polarization technique. A synergistic effect was observed between PA and KI as evident from the values of synergism parameter found to be greater than unity.

Original language	English
Pages (from-to)	1777-1786
Number of pages	10
Journal	Corrosion Science
Volume	52
Issue number	5
DOIs	https://doi.org/10.1016/j.corsci.2010.01.026
State	Published - May 2010
Externally published	Yes

Bibliographical note

Funding Information:
S.A. Umoren acknowledges the Chinese Academy of Sciences (CAS) and Academy of Sciences for the Developing World (TWAS) for the CAS-TWAS Postdoctoral Fellowship. Pan Chen is gratefully acknowledged for technical assistance in performing the AFM surface analyses.

Keywords

A. Iodide ion
A. Iron
A. Polyacrylamide
C. Adsorption
C. Corrosion inhibition
C. Synergism

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science

Access to Document

10.1016/j.corsci.2010.01.026

Cite this

@article{a535bf12c3bc4b66a7109c8572a5c373,

title = "Electrochemical study of corrosion inhibition and adsorption behaviour for pure iron by polyacrylamide in H2SO4: Synergistic effect of iodide ions",

abstract = "Corrosion inhibition and adsorption behaviour for pure iron in 0.5 M H2SO4 by polyacrylamide (PA) were investigated using electrochemical techniques. The effect of iodide ion additives was also studied. It was found that inhibition efficiency increased with PA concentration. Corrosion inhibition was afforded by adsorption of PA onto the metal following El-Awady kinetic-thermodynamic adsorption isotherm model via chemisorption mechanism. A mixed inhibition mechanism is proposed for the inhibitive effects of PA as revealed by potentiodynamic polarization technique. A synergistic effect was observed between PA and KI as evident from the values of synergism parameter found to be greater than unity.",

keywords = "A. Iodide ion, A. Iron, A. Polyacrylamide, C. Adsorption, C. Corrosion inhibition, C. Synergism",

author = "Umoren, \{S. A.\} and Y. Li and Wang, \{F. H.\}",

note = "Funding Information: S.A. Umoren acknowledges the Chinese Academy of Sciences (CAS) and Academy of Sciences for the Developing World (TWAS) for the CAS-TWAS Postdoctoral Fellowship. Pan Chen is gratefully acknowledged for technical assistance in performing the AFM surface analyses.",

year = "2010",

month = may,

doi = "10.1016/j.corsci.2010.01.026",

language = "English",

volume = "52",

pages = "1777--1786",

journal = "Corrosion Science",

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TY - JOUR

T1 - Electrochemical study of corrosion inhibition and adsorption behaviour for pure iron by polyacrylamide in H2SO4

T2 - Synergistic effect of iodide ions

AU - Umoren, S. A.

AU - Li, Y.

AU - Wang, F. H.

N1 - Funding Information: S.A. Umoren acknowledges the Chinese Academy of Sciences (CAS) and Academy of Sciences for the Developing World (TWAS) for the CAS-TWAS Postdoctoral Fellowship. Pan Chen is gratefully acknowledged for technical assistance in performing the AFM surface analyses.

PY - 2010/5

Y1 - 2010/5

N2 - Corrosion inhibition and adsorption behaviour for pure iron in 0.5 M H2SO4 by polyacrylamide (PA) were investigated using electrochemical techniques. The effect of iodide ion additives was also studied. It was found that inhibition efficiency increased with PA concentration. Corrosion inhibition was afforded by adsorption of PA onto the metal following El-Awady kinetic-thermodynamic adsorption isotherm model via chemisorption mechanism. A mixed inhibition mechanism is proposed for the inhibitive effects of PA as revealed by potentiodynamic polarization technique. A synergistic effect was observed between PA and KI as evident from the values of synergism parameter found to be greater than unity.

AB - Corrosion inhibition and adsorption behaviour for pure iron in 0.5 M H2SO4 by polyacrylamide (PA) were investigated using electrochemical techniques. The effect of iodide ion additives was also studied. It was found that inhibition efficiency increased with PA concentration. Corrosion inhibition was afforded by adsorption of PA onto the metal following El-Awady kinetic-thermodynamic adsorption isotherm model via chemisorption mechanism. A mixed inhibition mechanism is proposed for the inhibitive effects of PA as revealed by potentiodynamic polarization technique. A synergistic effect was observed between PA and KI as evident from the values of synergism parameter found to be greater than unity.

KW - A. Iodide ion

KW - A. Iron

KW - A. Polyacrylamide

KW - C. Adsorption

KW - C. Corrosion inhibition

KW - C. Synergism

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DO - 10.1016/j.corsci.2010.01.026

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EP - 1786

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