Abstract
Inhibition action of seroquel on corrosion of zinc in 0.1 M HCl solution was investigated using weight loss, electrochemical potentiodynamic polarization and impedance spectroscopic techniques. Corrosion inhibition efficiency showed the positive effect with increase in concentration of inhibitor and with the increase in temperature. Results obtained from all the methods are in good agreement with each other. Inhibition effect of inhibitor is due to the adsorption of seroquel molecule on zinc surface from bulk of the solution and the process of adsorption follows Temkin’s adsorption isotherm. Potentiodynamic polarization studies revealed that seroquel acts as a mixed type of inhibitor. Corrosion inhibition mechanism is explained by activation and thermodynamic parameters. Surface morphology of the corroded metal was studied by scanning electron microscopic studies and FT-IR spectrum of the corrosion product further confirms the process of adsorption of seroquel on metal surface.
Highlights
Corrosion is a spontaneous surface phenomenon results in deterioration of metal or alloys when it interacts with surrounding environment
The corrosion of zinc in 0.1 M HCl was effectively reduced by seroquel drug molecule
The inhibition efficiency of seroquel on zinc surface from the weight loss method is 84.38% at 333 K, which is in good agreement with inhibition efficiency of Tafel polarization (82.30%) and electrochemical impedance spectroscopy (EIS) (86.12%) at 333 K
Summary
Corrosion is a spontaneous surface phenomenon results in deterioration of metal or alloys when it interacts with surrounding environment. International Journal of Industrial Chemistry (2019) 10:17–30 pharmaceutical compounds offers interesting possibilities for corrosion inhibition due to the presence of heteroatoms like nitrogen, sulfur and oxygen in their structure and is of particular interest because of their safe use, high solubility in water and high molecular size [30]. In the present paper, corrosion inhibition of zinc in 0.1 M HCl solution was investigated using seroquel as inhibitor. Seroquel is an antipsychotic drug, used to treat schizophrenia and other bipolar disorder and used as inhibitor for corrosion of zinc in the present study. Weight loss studies were performed by immersing cleaned zinc strips in 100 cm of 0.1 M HCl solution containing different concentration of inhibitor. FT-IR spectrum of the pure compound and the corrosion product scrapped from the metal surface was carried out using Frontier Perkin Elmer spectrophotometer
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