Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)
Published: Feb. 7, 2025
This study investigates the thermodynamics, kinetics, and adsorption mechanisms of Lavender angustifolia extract (LAE) as a corrosion inhibitor for stainless steel (316SS) in desalination units. The primary aim is to evaluate efficacy LAE mitigating 5.0 M HCl solution under dynamic conditions. High-Performance Liquid Chromatography (HPLC) analysis identified key components that contribute inhibition, including linalyl acetate (41.7%), linalool (13.6%), 1,8-cineole (8.3%), β-ocimene (6.2%), terpinen-4-ol (5.7%), lavandulyl (7.5%), camphor (4.7%). Results indicate inhibitory efficiency increases with concentration, peaking at 94.3% 300 mg L⁻¹. Freundlich isotherm model best describes experimental data. Notably, activation energy from 7.17 kJ mol⁻¹ 21.65 addition LAE, reflecting enhanced protection. enthalpy change (∆H*) presence (19.04 mol⁻¹) significantly greater than extract-free (4.55 mol⁻¹), indicating improved resistance 316SS. Electrochemical techniques confirmed mixed-type inhibition behavior while UV SEM-EDAX analyses demonstrated effective on surface.
Language: Английский