Inhibition effects of a synthesized novel 4-aminoantipyrine derivative on the corrosion of mild steel in hydrochloric acid solution together with quantum chemical studies

Sutiana Junaedi, Ahmed A. Al-Amiery, Abdulhadi Kadihum, Abdul Amir H. Kadhum, Abu Bakar Mohamad

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

1,5-Dimethyl-4-((2-methylbenzylidene)amino)-2-phenyl-1H-pyrazol-3(2H)-one (DMPO) was synthesized to be evaluated as a corrosion inhibitor. The corrosion inhibitory effects of DMPO on mild steel in 1.0 M HCl were investigated using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, open circuit potential (OCP) and electrochemical frequency modulation (EFM). The results showed that DMPO inhibited mild steel corrosion in acid solution and indicated that the inhibition efficiency increased with increasing inhibitor concentration. Changes in the impedance parameters suggested an adsorption of DMPO onto the mild steel surface, leading to the formation of protective films. The novel synthesized corrosion inhibitor was characterized using UV-Vis, FT-IR and NMR spectral analyses. Electronic properties such as highest occupied molecular orbital energy, lowest unoccupied molecular orbital energy (EHOMO and ELUMO, respectively) and dipole moment (μ) were calculated and discussed. The results showed that the corrosion inhibition efficiency increased with an increase in the EHOMO values but with a decrease in the ELUMO value.

Original languageEnglish
Pages (from-to)11915-11928
Number of pages14
JournalInternational Journal of Molecular Sciences
Volume14
Issue number6
DOIs
Publication statusPublished - Jun 2013

Fingerprint

Ampyrone
Corrosion
Hydrochloric Acid
Steel
hydrochloric acid
Hydrochloric acid
Carbon steel
corrosion
steels
Corrosion inhibitors
Molecular orbitals
Derivatives
inhibitors
Steel corrosion
Potentiodynamic polarization
Dipole moment
Protective coatings
Frequency modulation
Electrochemical impedance spectroscopy
molecular orbitals

Keywords

  • 2-methylbenzaldehyde
  • Corrosion inhibitor
  • Electrochemical impedance spectroscopy

ASJC Scopus subject areas

  • Computer Science Applications
  • Molecular Biology
  • Catalysis
  • Inorganic Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Physical and Theoretical Chemistry

Cite this

Inhibition effects of a synthesized novel 4-aminoantipyrine derivative on the corrosion of mild steel in hydrochloric acid solution together with quantum chemical studies. / Junaedi, Sutiana; Al-Amiery, Ahmed A.; Kadihum, Abdulhadi; Kadhum, Abdul Amir H.; Mohamad, Abu Bakar.

In: International Journal of Molecular Sciences, Vol. 14, No. 6, 06.2013, p. 11915-11928.

Research output: Contribution to journalArticle

Junaedi, Sutiana ; Al-Amiery, Ahmed A. ; Kadihum, Abdulhadi ; Kadhum, Abdul Amir H. ; Mohamad, Abu Bakar. / Inhibition effects of a synthesized novel 4-aminoantipyrine derivative on the corrosion of mild steel in hydrochloric acid solution together with quantum chemical studies. In: International Journal of Molecular Sciences. 2013 ; Vol. 14, No. 6. pp. 11915-11928.
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