Mitigation of Hydrogen Evolution during Zinc Corrosion in Aqueous Acidic Media Using 5-Amino-4-imidazolecarboxamide | ||||
| Egyptian Journal of Chemistry | ||||
| Article 3, Volume 62, Issue 5, May 2019, Page 811-825 PDF (1.34 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2018.6006.1507 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
S Abd El Wanees   1; M I Alahmdi2; M A Alsharif3; Y Atef4
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| 1Zagazig University, Chemistry Department, Faculty of Science, Egypt | ||||
| 2Tabuk Uinversity, Faculty of Science, Chemistry Departement | ||||
| 3Tabuk University, Faculty of Science | ||||
| 4Chemistry Administration, Cairo, Egypt | ||||
| Abstract | ||||
| The rate of H2 production was investigated during the dissolution of Zn in 0.5 M HCl in the absence and presence different concentrations of 5-amino-4-imidazole carboxamide (AIC). Different techniques such as gasometry, potentiodynamic, impedance and scanning electron microscope were used. The data indicated that the rate of hydrogen evolution was increased with the inundation time and temperature and was mitigated by AIC inhibitor. The potentiodynamic polarization and electrochemical impedance spectroscopy showed that AIC introduces an inhibitive film that can control the corrosion of zinc and the production of H2. Polarization data proved that AIC inhibitor acted as a surface-active molecule that behaves as a mixed-type inhibitor. The free energy of adsorption and adsorption-desorption equilibrium constant were deduced and discussed. | ||||
| Keywords | ||||
| imidazole; zinc; Corrosion inhibition; Hydrogen production; Potentiodynamic; impedance | ||||
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