Abstract
The effect of 1-(benzo(d)thiazol-2-yl)-3-chloro-4-(3,5-dichlorophenyl)-4-methylazetidin-2-one (BDMA) and 3-(benzo(d)thiazol-2-yl)-2-(3,5-dichlorophenyl)-2,5-dimethylthiazolidin-4-one (BDMT) on the corrosion of oil well tubular steel (N80 steel) in 15% hydrochloric acid solution was investigated by means of potentiodynamic polar- ization and electrochemical impedance spectroscopy (EIS) techniques. The surface morphology of the uninhibited and inhibited samples was studied with atomic force microscopy (AFM). The corrosion inhibition efficiency of both inhibi- tors increased with increasing inhibitors concentration. The adsorption of both inhibitor molecules on surface of N80 steel obeys Langmuir adsorption isotherm. Potentiodynamic polarization measurements indicated that both the stud- ied inhibitors act as mixed type inhibitor. Quantum chemical calculations were carried out using density functional theory (DFT) to correlate the experimental results with the theoretical results.
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