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Research Paper | Electrical Engineering | Egypt | Volume 3 Issue 5, May 2014 | Popularity: 6.3 / 10

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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

Edition: Volume 3 Issue 5, May 2014

Pages: 73 - 79

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