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Study of Synergistic Effect of Some Pyrazole Derivatives as Corrosion Inhibitors for Mild Steel in 1 M H2SO4

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Abstract

Six new pyrazole derivatives were successfully prepared and investigated as corrosion inhibitors for mild steel in 1 M H2SO4 solution by weight loss measurements for 24 h at 30°C. It was observed that at higher inhibitor concentrations, the rate of corrosion decreases, the inhibition efficiency increases as well as the surface coverage degree. The values of the standard free energy of adsorption showed that all prepared pyrazole derivatives afford physisorption effects. The correlation between experimental results and theoretical data could be concluded by using semiempirical molecular orbital calculations for the six studied inhibitors. Theoretical calculations were used to understand the interaction nature between the metal surface and the organic molecules as a corrosion inhibitors.

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ACKNOWLEDGMENTS

The authors would like to thank the staff of the Department of Chemistry, College of Science, Al-Nahrain University, Iraq for their help and cooperation throughout this research.

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Authors and Affiliations

  1. Department of Chemistry, College of Science, Al-Nahrain University, 64021, Baghdad, Iraq

    Zahraa Talib Khudhair &  Mehdi Salih Shihab

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  1. Zahraa Talib Khudhair
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  2. Mehdi Salih Shihab
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Correspondence to Mehdi Salih Shihab.

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Zahraa Talib Khudhair, Mehdi Salih Shihab Study of Synergistic Effect of Some Pyrazole Derivatives as Corrosion Inhibitors for Mild Steel in 1 M H2SO4 . Surf. Engin. Appl.Electrochem. 56, 601–609 (2020). https://doi.org/10.3103/S1068375520050142

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  • DOI: https://doi.org/10.3103/S1068375520050142

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