Synthesis and characterization of a novel organic corrosion inhibitor for mild steel in 1 M hydrochloric acid

Mohammed H.Othman Ahmed, Ahmed A. Al-Amiery, Yasmin K. Al-Majedy, Abdul Amir H. Kadhum, Abu Bakar Mohamad, Tayser Sumer Gaaz

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The synthesis and characterization of a novel organic corrosion inhibitor (4-(3-mercapto-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-b][1,2,4,5]tetrazin-6-yl)phenol), for mild steel in 1 M hydrochloric acid (HCl) has been successfully reported for the first time. The inhibitor evaluated as corrosion inhibitor for mild steel in 1 M of Hydrochloric acid solution using electrochemical impedance spectroscopy (EIS), and electrochemical frequency modulation (EFM) measurement techniques. Changes in the impedance parameters suggested an adsorption of the inhibitor onto the mild steel surface, leading to the formation of protective films. The results show that the inhibition efficiencies increased with increasing the concentrations of the inhibitors and decreased with increasing temperature. The maximum inhibition efficiency up to 67% at the maximum concentration 0.5 mM. This shows that those inhibitors are effective in helping to reduce and slowing down the corrosion process that occurs to mild steel with a hydrochloric acid solution by providing an organic inhibitor for the mild steel that can be weakened by increasing the temperature. The adsorption process of the synthesized organic inhibitor depends on its electronic characteristics in addition to steric effects and the nature of metal surface, temperature degree and the varying degrees of surface-site activity. The synthesized inhibitor molecules were absorbed by metal surface and follow Langmuir isotherms.

Original languageEnglish
Pages (from-to)728-733
Number of pages6
JournalResults in Physics
Volume8
DOIs
Publication statusPublished - 1 Mar 2018

Fingerprint

hydrochloric acid
inhibitors
corrosion
steels
synthesis
metal surfaces
impedance
adsorption
phenols
frequency modulation
surface temperature
isotherms
temperature

Keywords

  • Corrosion
  • EIS spectroscopy
  • Inhibitor
  • Mild steel

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ahmed, M. H. O., Al-Amiery, A. A., Al-Majedy, Y. K., Kadhum, A. A. H., Mohamad, A. B., & Gaaz, T. S. (2018). Synthesis and characterization of a novel organic corrosion inhibitor for mild steel in 1 M hydrochloric acid. Results in Physics, 8, 728-733. https://doi.org/10.1016/j.rinp.2017.12.039

Synthesis and characterization of a novel organic corrosion inhibitor for mild steel in 1 M hydrochloric acid. / Ahmed, Mohammed H.Othman; Al-Amiery, Ahmed A.; Al-Majedy, Yasmin K.; Kadhum, Abdul Amir H.; Mohamad, Abu Bakar; Gaaz, Tayser Sumer.

In: Results in Physics, Vol. 8, 01.03.2018, p. 728-733.

Research output: Contribution to journalArticle

Ahmed, Mohammed H.Othman ; Al-Amiery, Ahmed A. ; Al-Majedy, Yasmin K. ; Kadhum, Abdul Amir H. ; Mohamad, Abu Bakar ; Gaaz, Tayser Sumer. / Synthesis and characterization of a novel organic corrosion inhibitor for mild steel in 1 M hydrochloric acid. In: Results in Physics. 2018 ; Vol. 8. pp. 728-733.
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