A new approach for the evaluation of liquid waste generated from plant extraction process for the corrosion mitigation of carbon steel in acidic medium: Case of Chrysanthemum Coronarium stems

다국어 초록 (Multilingual Abstract)

In this study, the efficacy of liquid waste derived from the hydrodistillation of ChrysanthemumCoronarium stems as a corrosion inhibitor for carbon steel in 1 M HCl was investigated. Phytochemicalscreening and analysis of total phenolic and flavonoid contents were conducted to determine the chemicalabundance of the extract (CCSE). An electrochemical evaluation was performed using polarizationpotentiodynamic and electrochemical impedance spectroscopy at 293 K. The results revealed that theextract effectively suppressed the corrosion of carbon steel with an inhibition efficiency of 80% througha mixed inhibition mechanism. The effect of temperature on corrosion inhibition was evaluated, and thesynergistic effect of KI in combination with the CCSE inhibitor was also studied. Surface morphologyexamination of carbon steel was conducted through SEM-EDX analysis to further examine the electrochemicalfindings and to understand the surface changes caused by the inhibitor. Additionally, computationalanalysis utilizing Density Functional Theory (DFT) and Molecular Dynamics Simulation (MD) wasconducted to gain further insight into the electronic adsorption mechanism at the active sites of the phytochemicalcompounds.