Molecular insights through the experimental and theoretical study of the anticorrosion power of a new eco-friendly Cytisus multiflorus flowers extract in a 1 M sulfuric acid

The use of Cytisus Multiflorus Flowers Extract (CMFE) as a carbon steel corrosion inhibitor in 1 M H2SO4 solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods. Potentiodynamic polarization curves indicated that CMFE behaves as a mixed-type inhibitor. Quantum chemical parameters were also calculated, which provided a reasonable theoretical explanation for the adsorption and inhibition behavior of CMFE on the carbon steel. The presence of CMFE leads to the formation of a protective film revealed by the Scanning Electron Microscope (SEM) and attenuated total reflectance (FTIR-ATR). The process of corrosion inhibition of carbon steel by CMFE in a 1 M H2SO4 was studied by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analysis. The Density Functional Theory (DFT) and molecular dynamics (MD) studies are conducted to explore the connection between quantum calculations and experimental findings. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The use of Cytisus Multiflorus Flowers Extract (CMFE) as a carbon steel corrosion inhibitor in 1 M H2SO4 solution was investigated. The experimental results showed that CMFE behaves as a mixed-type inhibitor and forms a protective film. Theoretical calculations provided an explanation for the adsorption and inhibition behavior of CMFE.