WITHDRAWN: The ability of Lupine plant extract to adhere to copper surfaces in sulphamic acid and prevent corrosion

Abstract

Abstract The application of lupine extract in a 2 M sulfamic acid (H2NSO3H) solution effectively prevented copper corrosion. Various techniques were employed to conduct these experiments, including mass loss ML, dynamic potential polarization PL, and electrochemical impedance EIS. Theoretical calculations, such as DFT, Fukui function, and Monte Carlo simulations, were also utilized. FT-IR spectroscopy was utilized to analyze the surface composition of Cu. The shape of the Cu surface was determined using advanced nanotechnology techniques, specifically scanning electron microscopy (SEM). The investigation focused on the impact of Lupine extract on Cu corrosion in sulfamic acid at a temperature of 250C. The inhibition rate of Cu corrosion was assessed using mass loss (ML) as the primary measurement method. After conducting a thorough analysis of its interaction with copper surfaces, it was determined that the substance exhibits chemical adsorption characteristics and adheres to the Langmuir isotherm model. Upon examining the PL curves, it becomes evident that the Lupine extract functions as a mixed-type inhibitor. The effectiveness of inhibition was observed to rise as the concentration of Lupine increased. Furthermore, the findings demonstrate that increased temperatures have a detrimental impact on the effectiveness of inhibition. The density functional theory (DFT) and Monte Carlo simulation (MC) were utilized to compare the experimental results with the theoretical calculations.