Effect of halide ions on the corrosion inhibition of aluminium in alkaline medium using polyvinyl alcohol

S. A. Umoren; E. E. Ebenso; P. C. Okafor; U. J. Ekpe; O. Ogbobe

doi:10.1002/app.25446

Effect of halide ions on the corrosion inhibition of aluminium in alkaline medium using polyvinyl alcohol

S. A. Umoren^*
, E. E. Ebenso
, P. C. Okafor
, U. J. Ekpe
, O. Ogbobe

^*Corresponding author for this work

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

83 Scopus citations

Abstract

The corrosion inhibition of aluminum in NaOH in the presence of polyvinyl alcohol (PVA) at 30 and 40°C and the effect of addition of halides (KCl, KBr, KI) were studied using weight loss and hydrogen evolution methods. Results obtained showed that PVA acts as a corrosion inhibitor in the alkaline environment. The inhibition efficiency increased with increase in concentration of PVA and synergistically increased on the addition of the halides but however decreased with rise in temperature. The phenomenon of physical adsorption is proposed from the obtained E_a and Q_ads values. PVA was found to obey Freundlich and Frumkin adsorption isotherms. The increase in inhibition efficiency I (%), surface coverage 9 values as well as synergistic parameter, S_I were found to be in the order I^- > Br^- > Cl^-, which clearly indicates that the radii and electronegativity of the halides play a significant role in the adsorption process.

Original language	English
Pages (from-to)	2810-2816
Number of pages	7
Journal	Journal of Applied Polymer Science
Volume	103
Issue number	5
DOIs	https://doi.org/10.1002/app.25446
State	Published - 5 Mar 2007
Externally published	Yes

Keywords

Adsorption isotherms
Alkaline
Corrosion inhibition
Halide ions
Polyvinyl alcohol
Synergism

ASJC Scopus subject areas

General Chemistry
Surfaces, Coatings and Films
Polymers and Plastics
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/app.25446

Cite this

@article{ade21d07365b4e558d753b4dfe2059f4,

title = "Effect of halide ions on the corrosion inhibition of aluminium in alkaline medium using polyvinyl alcohol",

abstract = "The corrosion inhibition of aluminum in NaOH in the presence of polyvinyl alcohol (PVA) at 30 and 40°C and the effect of addition of halides (KCl, KBr, KI) were studied using weight loss and hydrogen evolution methods. Results obtained showed that PVA acts as a corrosion inhibitor in the alkaline environment. The inhibition efficiency increased with increase in concentration of PVA and synergistically increased on the addition of the halides but however decreased with rise in temperature. The phenomenon of physical adsorption is proposed from the obtained Ea and Qads values. PVA was found to obey Freundlich and Frumkin adsorption isotherms. The increase in inhibition efficiency I (\%), surface coverage 9 values as well as synergistic parameter, SI were found to be in the order I- > Br- > Cl-, which clearly indicates that the radii and electronegativity of the halides play a significant role in the adsorption process.",

keywords = "Adsorption isotherms, Alkaline, Corrosion inhibition, Halide ions, Polyvinyl alcohol, Synergism",

author = "Umoren, \{S. A.\} and Ebenso, \{E. E.\} and Okafor, \{P. C.\} and Ekpe, \{U. J.\} and O. Ogbobe",

year = "2007",

month = mar,

day = "5",

doi = "10.1002/app.25446",

language = "English",

volume = "103",

pages = "2810--2816",

journal = "Journal of Applied Polymer Science",

issn = "0021-8995",

number = "5",

}

TY - JOUR

T1 - Effect of halide ions on the corrosion inhibition of aluminium in alkaline medium using polyvinyl alcohol

AU - Umoren, S. A.

AU - Ebenso, E. E.

AU - Okafor, P. C.

AU - Ekpe, U. J.

AU - Ogbobe, O.

PY - 2007/3/5

Y1 - 2007/3/5

N2 - The corrosion inhibition of aluminum in NaOH in the presence of polyvinyl alcohol (PVA) at 30 and 40°C and the effect of addition of halides (KCl, KBr, KI) were studied using weight loss and hydrogen evolution methods. Results obtained showed that PVA acts as a corrosion inhibitor in the alkaline environment. The inhibition efficiency increased with increase in concentration of PVA and synergistically increased on the addition of the halides but however decreased with rise in temperature. The phenomenon of physical adsorption is proposed from the obtained Ea and Qads values. PVA was found to obey Freundlich and Frumkin adsorption isotherms. The increase in inhibition efficiency I (%), surface coverage 9 values as well as synergistic parameter, SI were found to be in the order I- > Br- > Cl-, which clearly indicates that the radii and electronegativity of the halides play a significant role in the adsorption process.

AB - The corrosion inhibition of aluminum in NaOH in the presence of polyvinyl alcohol (PVA) at 30 and 40°C and the effect of addition of halides (KCl, KBr, KI) were studied using weight loss and hydrogen evolution methods. Results obtained showed that PVA acts as a corrosion inhibitor in the alkaline environment. The inhibition efficiency increased with increase in concentration of PVA and synergistically increased on the addition of the halides but however decreased with rise in temperature. The phenomenon of physical adsorption is proposed from the obtained Ea and Qads values. PVA was found to obey Freundlich and Frumkin adsorption isotherms. The increase in inhibition efficiency I (%), surface coverage 9 values as well as synergistic parameter, SI were found to be in the order I- > Br- > Cl-, which clearly indicates that the radii and electronegativity of the halides play a significant role in the adsorption process.

KW - Adsorption isotherms

KW - Alkaline

KW - Corrosion inhibition

KW - Halide ions

KW - Polyvinyl alcohol

KW - Synergism

UR - https://www.scopus.com/pages/publications/33847339736

U2 - 10.1002/app.25446

DO - 10.1002/app.25446

M3 - Article

AN - SCOPUS:33847339736

SN - 0021-8995

VL - 103

SP - 2810

EP - 2816

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

IS - 5

ER -

Effect of halide ions on the corrosion inhibition of aluminium in alkaline medium using polyvinyl alcohol

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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