Fluvoxamine-based corrosion inhibitors for {J55} steel in aggressive oil and gas well treatment fluids
By Ituen, E. B.; James, A. O.; Akaranta, O.
Published in Egyptian Journal of Petroleum
NULL
2016
Abstract
Abstract Fluvoxamine (FLU), a non-toxic compound was investigated as an alternative anti-corrosive additive for inhibition of {J55} steel corrosion in acidic oil well treatment fluids. The aggressive fluid was simulated using 15% and 1 M HCl. Corrosion of the steel was monitored by Electrochemical Impedance Spectroscopy (EIS), Potentiodynamic Polarization (PDP), Linear Polarization Resistance (LPR), Electrochemical Frequency Modulation (EFM) and Weight Loss (WL) techniques. UV-Vis spectroscopy provided evidence of formation of a complex surface film due to adsorption of {FLU} on the {J55} steel surface. The adsorption process was both physical and chemical in mechanism as best approximated by the Langmuir adsorption isotherm. The adsorption was also spontaneous and exothermic in the direction of increase in entropy of the bulk phase. Maximum inhibition efficiency was obtained with 1.0 ?M {FLU} and decreased from 91.5% to 78.0% when concentration of {HCl} was increased from 1 M to 15% at 30
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