Phenyl Thiourea as Corrosion Inhibitor for Mild Steel in Strong Hydrochloric Acid

Authors

  • Aprael S. Yaro Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq
  • Dhuha A. Abdulaaima Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq

DOI:

https://doi.org/10.31699/IJCPE.2012.2.1

Keywords:

Corrosion, Phenyl Thiourea, Electrochemical Measurements, dimensionless separation factor, Factorial Design, Adsorption, Activation parameters

Abstract

The inhibitive action of Phenyl Thiourea (PTU) on the corrosion of mild steel in strong Hydrochloric acid, HCl, has been investigated by weight loss and potentiostatic polarization. The effect of PTU concentration, HCl concentration, and temperature on corrosion rate of mild steel were verified using 2 levels factorial design and surface response analysis through weight loss approach, while the electrochemical measurements were used to study the behavior of mild steel in 5-7N HCl at temperatures 30, 40 and 50 °C, in absence and presence of PTU. It was verified that all variables and their interaction were statistically significant. The adsorption of (PTU) is found to obey the Langmuir adsorption isotherm. The effect of temperature on the adsorption process showed that the adsorption process is exothermic, spontaneous and represents mixed chemical and physical adsorption for PTU on the metal surface.

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Published

2012-06-30

Issue

Vol. 13 No. 2 (2012): Iraqi Journal of Chemical and Petroleum Engineering

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

How to Cite

S. Yaro, A., & A. Abdulaaima, D. (2012). Phenyl Thiourea as Corrosion Inhibitor for Mild Steel in Strong Hydrochloric Acid. Iraqi Journal of Chemical and Petroleum Engineering, 13(2), 1-9. https://doi.org/10.31699/IJCPE.2012.2.1

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