Chalcone oxime derivatives as new inhibitors corrosion of carbon steel in 1 M HCl solution

In this research, 1,3-diphenylprop-2-en-1-one oxime (CO) and 4-nitrophenyl-1-phenylprop-2-en-1-one (CO-NO2) was synthesized and its adsorption properties and corrosion inhibition ability was evaluated for carbon steel (CS) in 1 M HCl at 293-323 K temperature using chemical and electrochemical techniques such as weight loss measurements (WL), potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). Results evince that the inhibition activity (IE%) enhances with the compounds concentration and may achieve a maximum of 95 and 91% for CO and CO-NO2, respectively at 293 K. In obedience with PDP findings, the tested compounds act as some mixed-type inhibitors. Survey of the temperature effect discloses that the inhibitory molecule is chemisorbed on carbon steel substrate. The adsorption of CO and CO-NO2 occurs in accordance to the Langmuir's isotherm. Scanning Electron Microscopy (SEM) and UV-visible revealed the development of barrier film hindering the access of aggressive ions into steel surface. The theoretical findings suggested by electronic/atomic computer simulations supported the inhibitive chemicals interfacial adsorption through reactive centers. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The research evaluated the adsorption properties and corrosion inhibition ability of CO and CO-NO2 on carbon steel in 1 M HCl using chemical and electrochemical techniques, showing that they act as mixed-type inhibitors with good inhibition activity and can form a barrier film on the steel surface.