Synergistic of a coumarin derivative with potassium iodide on the corrosion inhibition of aluminum alloy in 1.0 M H2SO4

Abu Bakar Mohamad, Abdul Amir H. Kadhum, Ahmed A. Al-Amiery, Lim Chai Ying, Ahmed Y. Musa

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Synergistic effects of the addition of KI on the corrosion inhibitive performance of a coumarin derivative on an aluminum alloy in 1.0 M H 2SO4 at different temperatures were studied using various electrochemical measurements. Density functional theory was used to calculate the quantum chemical parameters of the coumarin derivative. The experimental results showed that the coumarin derivative is considered as a mixedtype inhibitor. The corrosion potential values were almost unchanged upon the addition of PBBC to the acidic solution. The inhibition efficiency increases with increasing inhibitor concentration and increases further in the presence of 6.02 mM KI but decreases significantly at higher temperature. The adsorption of PBBC obeyed the Langmuir isotherm, and being chemically adsorbed at lower temperatures, while physical adsorption is favoured at higher temperature. The theoretical results indicated that the coumarin derivative was adsorbed onto the surface of Al2024 through the sulfur, oxygen and nitrogen atoms.

Original languageEnglish
Pages (from-to)459-467
Number of pages9
JournalMetals and Materials International
Volume20
Issue number3
DOIs
Publication statusPublished - 2014

Fingerprint

Potassium iodide
potassium iodides
Potassium Iodide
Coumarins
aluminum alloys
inhibitors
Aluminum alloys
corrosion
Corrosion
Derivatives
adsorption
nitrogen atoms
oxygen atoms
isotherms
sulfur
density functional theory
Adsorption
Temperature
Corrosion inhibitors
Sulfur

Keywords

  • corrosion
  • electrochemistry
  • metals
  • surface
  • thin film

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys
  • Mechanics of Materials
  • Materials Chemistry

Cite this

Synergistic of a coumarin derivative with potassium iodide on the corrosion inhibition of aluminum alloy in 1.0 M H2SO4 . / Mohamad, Abu Bakar; Kadhum, Abdul Amir H.; Al-Amiery, Ahmed A.; Ying, Lim Chai; Musa, Ahmed Y.

In: Metals and Materials International, Vol. 20, No. 3, 2014, p. 459-467.

Research output: Contribution to journalArticle

Mohamad, Abu Bakar ; Kadhum, Abdul Amir H. ; Al-Amiery, Ahmed A. ; Ying, Lim Chai ; Musa, Ahmed Y. / Synergistic of a coumarin derivative with potassium iodide on the corrosion inhibition of aluminum alloy in 1.0 M H2SO4 In: Metals and Materials International. 2014 ; Vol. 20, No. 3. pp. 459-467.
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