Substituted 2-imidazoline derivative: New and efficient corrosion inhibitors for mild steel in sulphuric acid solution

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dc.categoryJournal Article
dc.contributor.authorRajalakshmi, R
dc.contributor.authorNalini, D
dc.date.accessioned2017-02-03T17:25:57Z
dc.date.available2017-02-03T17:25:57Z
dc.date.issued2014
dc.departmentChemistryen_US
dc.description.abstractThe aim of this work is to obtain deeper insight into the mechanism of the protective action of the imidazole-based corrosion inhibitor, 2-(4'-N, N-Dimethylaminophenyl)-imidazoline (DMAP2l). Investigations were performed on mild steel in 0.5 M H2 SO4 by electrochemical methods and non - electrochemical methods. Maximum protection efficiency reaches about 85% for DMAP2I at 200 ppm concentration level. The adsorption of the imidazoline derivative on mild steel surface follows Langmuir and Tempkin isotherm. The adsorption free energy on mild steel (20 — 30 kJ/mol) reveals a comprehensive (physical and chemical) adsorption of the inhibitors on the metal surface. Polarization curves reveal that DMAP2l act as a mixed-type inhibitor. Results obtained from potentiodynamic polarization and impedance measurements are in good agreement. Quantum chemical method is used to explore the relationship between the inhibitor molecular properties and its inhibition efficiency. The density function theory (DFT) is also used to study the structural properties of the inhibitor. It is found that when the imidazole derivative adsorbs on the mild steel surface, molecular structure influences their interaction mechanism. The inhibition efficiencies of the compound showed a certain relationship to highest occupied molecular orbital (HOMO) energy and Mulliken atomic charges.en_US
dc.identifier.urihttps://ir.avinuty.ac.in/handle/avu/1282
dc.langEnglishen_US
dc.publisher.nameSeventeenth National Congress on Corrosion Controlen_US
dc.publisher.typeNationalen_US
dc.titleSubstituted 2-imidazoline derivative: New and efficient corrosion inhibitors for mild steel in sulphuric acid solutionen_US
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