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The main purpose of the present study is to determine anticorrosion properties in oilfield produced water of the  N′ -phenylbenzohydrazide and its metal complex derivatives by experimental studies and quantum chemical calculations as well as investigate the relationship between experimental and theoretical study results through a correlation study. The molecular structures of  N′ -phenylbenzohydrazide and its metal complexes (Cu, Mn, Co) obtained characterized by using UV–Vis and FT–IR techniques. The electrochemical polarization measurements, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy techniques were used experimentally in the discovery of corrosion inhibition properties of the metal complexes in oilfield produced water. Some important quantum chemical parameters of the metal complexes were calculated using quantum chemical software, Gaussian 03 W. The electrochemical polarization measurements showed that the inhibition efficiencies of metal complexes were increased with an increase of concentration. The results showed that the metal complexes acted as anodic-type inhibitors. The experimental inhibition activities of studied metal complexes were found to be highly correlated with calculated some parameters, E T , E LUMO , E HOMO  and E Gap .

zeitschrift für physikalische chemie

Synthesis, Characterization and Corrosion Inhibition of  N′ -Phenylbenzohydrazide Derivative Metal Complexes: Experimental and Quantum Chemical Studies