Abstract
The inhibition performance of ibuprofen triazole (IT) on mild steel (MS) corrosion in 1.0 M HCl and 0.5 M H2SO4 has been investigated by using electrochemical (potentiodynamic polarization and electrochemical impedance spectroscopy), gravimetric, and quantum chemical studies. Electrochemical investigation indicates that IT hampers MS corrosion via adsorption through a mixed inhibition mechanism. The protection ability of IT increases with an increasing concentration of inhibitor and decreases with increasing temperature. The adsorption of IT molecules on MS surface follows the Langmuir adsorption isotherm. Certain quantum chemical parameters were calculated to ascertain the correlation between inhibitive effect and molecular structure of IT.
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Acknowledgments
The authors are grateful to the authorities of the Department of Chemistry, Kuvempu University, Karnataka, India, for providing lab facilities. The authors also thank the Department of Science and Technology, New Delhi, Government of India (DST: Project Sanction No. 100/IFD/1924/2008-2009 dated 02.07.2008) for providing instrumental facilities and University Grants Commission, New Delhi, Government of India [UGC: Project Sanction No. 41-231/2012 (SR) dated 16.07.2012] for providing the Hyperchem software facility.
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Pavithra, M.K., Venkatesha, T.V., Punith Kumar, M.K. et al. Investigation of the inhibition effect of ibuprofen triazole against mild steel corrosion in an acidic environment. Res Chem Intermed 41, 7163–7177 (2015). https://doi.org/10.1007/s11164-014-1804-5
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DOI: https://doi.org/10.1007/s11164-014-1804-5