Thermodynamic and Adsorption Behavior of eco-Friendly Purine Derivatives on the Corrosion of Carbon Steel in 1 M HCl
International Journal of Science and Research (IJSR)

International Journal of Science and Research (IJSR)
www.ijsr.net | Open Access | Fully Refereed | Peer Reviewed International Journal

ISSN: 2319-7064

Research Paper | Material Science and Engineering | Egypt | Volume 3 Issue 5, May 2014

Thermodynamic and Adsorption Behavior of eco-Friendly Purine Derivatives on the Corrosion of Carbon Steel in 1 M HCl

Ahmed A. Farag, Khalid Zakaria

The behavior of carbon steel in 1.0 mol dm-3 HCl in the presence of novel purine inhibitors namely 1H-pyrazolo[3; 4-d]pyrimidin-4 (2H) -one (PPO) and 6-[ (1-methyl-4-nitro-5-imidazolyl) sulfanyl]purine (ISP) in the concentration range (1104 5103 mol dm3) was studied using weight loss; open circuit potential; potentiodynamic polarization electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) techniques. Potentiodynamic polarization shows that PPO and ISP act as mixed-type inhibitors. The values of the activation energy; equilibrium constant; free energy of adsorption; activation enthalpy and activation entropy were discussed. The adsorption of inhibitors on metal followed Langmuirs adsorption isotherm. The values of suggest the chemical adsorption of PPO and ISP on carbon steel surface.

Keywords: Carbon steel, Acid corrosion, EIS, Polarization, SEM

Edition: Volume 3 Issue 5, May 2014

Pages: 1092 - 1099

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Ahmed A. Farag, Khalid Zakaria, "Thermodynamic and Adsorption Behavior of eco-Friendly Purine Derivatives on the Corrosion of Carbon Steel in 1 M HCl", International Journal of Science and Research (IJSR), https://www.ijsr.net/search_index_results_paperid.php?id=20131937, Volume 3 Issue 5, May 2014, 1092 - 1099

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