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Corrosion inhibition for low-carbon steel in 1 M H2SO4 solution by phenytoin: evaluation of the inhibition potency of another “anticorrosive drug”

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Abstract

The inhibitive properties of a drug, phenytoin (5,5-diphenylimidazolidine-2,4-dione, 5DID), on corrosion of low-carbon steel (LCS) in aerated 1 M H2SO4 solution has been evaluated in this study using gravimetric and polarization measurements. Judging from the results obtained, the drug served as a good inhibitor for LCS. The inhibition efficiency (I %) of 5DID in this medium was found to be concentration and temperature dependent, and the adsorption data fit the Langmuir and Temkin isotherm models. Polarization curves revealed that 5DID specifically affected the anodic reaction of the corrosion process. The electrochemical and gravimetric results were complemented with atomic force microscopy surface characterization.

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Acknowledgments

Authors are grateful to King Fahd University of Petroleum and Minerals (KFUPM) for providing the facilities for this research.

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Authors and Affiliations

  1. Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia

    Ubong M. Eduok & Mazen Khaled

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  1. Ubong M. Eduok
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  2. Mazen Khaled
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Correspondence to Ubong M. Eduok.

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11164_2014_1741_MOESM1_ESM.docx

Supplementary material 1. Calculated values of corrosion rate and inhibition efficiency, and adsorption parameters from various adsorption isotherm models for LCS in 1 M H2SO4 for 5DID at 25 and 60 °C (DOCX 23 kb)

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Eduok, U.M., Khaled, M. Corrosion inhibition for low-carbon steel in 1 M H2SO4 solution by phenytoin: evaluation of the inhibition potency of another “anticorrosive drug”. Res Chem Intermed 41, 6309–6324 (2015). https://doi.org/10.1007/s11164-014-1741-3

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  • DOI: https://doi.org/10.1007/s11164-014-1741-3

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