International Journal of Science and Research (IJSR)

International Journal of Science and Research (IJSR)
Call for Papers | Fully Refereed | Open Access | Double Blind Peer Reviewed

ISSN: 2319-7064

Downloads: 110 | Views: 181 | Weekly Hits: ⮙1 | Monthly Hits: ⮙1

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 [7] | Khalid Zakaria [2]

Abstract: 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

How to Download this Article?

Type Your Valid Email Address below to Receive the Article PDF Link

Verification Code will appear in 2 Seconds ... Wait