The adsorption and corrosion inhibition of 8-hydroxy-7-quinolinecarboxaldehyde derivatives on C-steel surface in hydrochloric acid

A. M. Eldesoky; S. G. Nozha

doi:10.1016/j.cjche.2016.11.018

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The adsorption and corrosion inhibition of 8-hydroxy-7-quinolinecarboxaldehyde derivatives on C-steel surface in hydrochloric acid

Chemical Engineering Thermodynamics | Updated：2026-01-06

- The adsorption and corrosion inhibition of 8-hydroxy-7-quinolinecarboxaldehyde derivatives on C-steel surface in hydrochloric acid
- Chinese Journal of Chemical Engineering Vol. 25, Issue 9, Pages: 1256-1265(2017)
- Affiliations：
  
  1. Engineering Chemistry Department, High Institute of Engineering & Technology, New Damietta,Egypt
  2. Qunfudah Center for Scientific Research(QCSR), Al-Qunfudah University College, Umm Al-Qura University, Saudi Arabia,Al
  3. Ministry of Health, Domyat Laboratory, Damietta,Egypt
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.11.018
  CLC：
- Published：2017
- Accepted：
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A. M. Eldesoky, S. G. Nozha. The adsorption and corrosion inhibition of 8-hydroxy-7-quinolinecarboxaldehyde derivatives on C-steel surface in hydrochloric acid[J]. , 2017, 25(9): 1256-1265.
DOI：

A. M. Eldesoky, S. G. Nozha. The adsorption and corrosion inhibition of 8-hydroxy-7-quinolinecarboxaldehyde derivatives on C-steel surface in hydrochloric acid[J]. , 2017, 25(9): 1256-1265. DOI： 10.1016/j.cjche.2016.11.018.

摘要

Abstract

The protection influence of 8-hydroxy-7-quinolinecarboxaldehyde derivatives against C-steel corrosion was studied in 2 mol·L

-1

HCl solutions at 30℃. Measurements were conducted under various experimental conditions using weight loss

potentiodynamic polarization

electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. These studies have shown that 8-hydroxy-7-quinolinecarboxaldehyde derivatives are very good "green"

mixed-type inhibitors. Corrosion rates obtained from both EFM and EIS methods are comparable with those recorded using Tafel extrapolation method

confirming validation of corrosion rates measured by the latter. The inhibitive action of these 8-hydroxy-7-quinolinecarboxaldehyde derivatives was discussed in terms of blocking the electrode surface by adsorption of the molecules through the active centers contained in their structures following Langmuir adsorption isotherm. Quantum chemical method was also employed to explore the relationship between the inhibitor molecular properties and its protection efficiency.

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