F. E. Kalai, T. Chelfi, N. Benchat
Jun 24, 2020
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0
Influential Citations
15
Citations
Journal
Journal of Bio- and Tribo-Corrosion
Abstract
The present study deals with the synthesis and the corrosion inhibition performance of three pyridazinone derivatives, namely (E)-6-(4-chlorostyryl)-4-(4-(trifluoromethyl) -benzyl)pyridazin-3(2H)-one ( 3a ), (E)-4-(3-chlorobenzyl)-6-(3-chlorostyryl)pyridazin-3(2H)-one ( 3b ), and (E)-6-(4-chlorostyryl)-4-(4-methylbenzyl)pyridazin-3(2H)-one ( 3c ), was investigated for mild steel corrosion in 1 M HCl medium using weight loss measurements, potentiodynamic polarization (PDP), Electrochemical Impedance Spectroscopy (EIS) techniques. PDP curves reveal that all studied compounds are predicted to be mixed inhibitors influencing both cathodic hydrogen evolvement and anodic metal dissolution. Further, EIS study shows that the charge transfer resistance increases with the inhibitor concentration, and the adsorption of 3b obeys the Langmuir isotherm. Quantum chemical calculation was employed also to correlate the molecular structure of pyridazinone derivatives and their experimental inhibition efficiencies. All results show that 3b exhibits the best inhibitive action at 10 −3 M, which may be related to a better electron acceptance ability of this molecule.