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Języki publikacji
Abstrakty
Nifedipine, a pyridine derivative was investigated as corrosion inhibitor for API 5L X-52 steel in 2 M HCl solution by potentiodynamic polarization, electrochemical impedance spectroscopy and quantum chemical calculations. Statistical tools were used to compare results of the experimental methods. The results showed that nifedipine is capable of inhibiting the corrosion of API 5L X-52 steel in 2 M HCl solution. Potentiodynamic polarization results reveal that nifedipine functions as a mixed-type inhibitor and presents an inhibition efficiency of about 78% at 500 ppm. Impedance data reveal an increasing charge transfer resistance with increasing inhibitor concentration and also shows comparable inhibition efficiency of about 89-94% at 500 ppm. Thermodynamic parameters imply that nifedipine is adsorbed on the steel surface by a physiochemical process and obeys Langmuir adsorption isotherm. The calculated molecular properties namely the highest occupied molecular orbital energy, lowest unoccupied molecular orbital energy, chemical hardness, energy gap, dipole moment, electronegativity and global nucleophilicity index all show a positive relationship to the observed corrosion inhibition efficiency.
Wydawca
Czasopismo
Rocznik
Tom
Strony
125--131
Opis fizyczny
Bibliogr. 28 poz., rys., tab., wzory
Twórcy
autor
- University of Calabar, Corrosion and Electrochemistry Research Laboratory, Department of Pure and Applied Chemistry, Calabar-Nigeria
autor
- Cross River University of Technology, Materials and Electrochemistry Research Group, Department of Chemistry, Calabar-Nigeria
Bibliografia
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Uwagi
EN
1. This work was supported by China-Africa Science and Technology Partner-ship Program (CASTEP).
PL
2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-86246021-7042-4032-aa2f-958ec3a1a087