Investigation of the Inhibition Effect of Nontoxic Purine Derivatives on the Carbon Steel Corrosion in 0.5 M H2SO4 Solution

Ahmed A. Farag

Abstract: The behavior of carbon steel in 0.5 M H2SO4 in the presence of novel purine inhibitors namely 1H-pyrazolo [3; 4-d]pyrimidin-4 (2H) -one (P1) and 6- [ (1-methyl-4-nitro-5-imidazolyl) sulfanyl]purine (P2) in the concentration range (1104 5103 M) was studied using weight loss; open circuit potential; potentiodynamic polarization electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) techniques. Potentiodynamic polarization shows that P1 and P2 act as mixed-type inhibitors. The adsorption of inhibitors on metal followed Langmuirs adsorption isotherm. SEM images showed that the inhibitor molecules form a good protective film on the carbon steel surface.

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

How to Cite?: Ahmed A. Farag, "Investigation of the Inhibition Effect of Nontoxic Purine Derivatives on the Carbon Steel Corrosion in 0.5 M H2SO4 Solution", Volume 3 Issue 5, May 2014, International Journal of Science and Research (IJSR), Pages: 73-79, https://www.ijsr.net/getabstract.php?paperid=20131688, DOI: https://dx.doi.org/10.21275/20131688