Fecha de publicación: 25/10/2024 Fuente: Citrus Byproducts Extraction Abstract
This study presents an innovative approach to corrosion inhibition by utilizing Pisum sativum (pea) peel extract (PP) as a green, cost-effective, and sustainable inhibitor for copper in 3.5 wt% sodium chloride solution. Both polar (acetone) and nonpolar (hexane) extracts from pea peels were explored, leveraging agricultural waste to create eco-friendly alternatives to synthetic corrosion inhibitors. Phytochemical composition of the extracts was thoroughly analyzed using Gas chromatography-mass spectrometry analysis (GC-MS), revealing a rich blend of bioactive compounds that contribute to the corrosion inhibition process. The hexane extract (HPP) was found to include 27 distinct compounds, the most common are nonacosane, palmitic acid, 2-Pentadecanone, 6,10,14-trimethyl,2-Pentadecanone, and methyl palmitate. The acetone extract (APP) contained 33 different compounds, including 1,2-benzene dicarboxylic acid, bis (2ethylhexyl) ester (DHEP), docosane, and phytofluen. Electrochemical studies demonstrated that both hexane (HPP) and acetone (APP) extracts significantly enhance copper corrosion resistance, with inhibition efficiencies reaching up to 98% at 400 ppm for APP. The PP extracts adsorbed onto the copper surface follow the Langmuir isotherm model, indicating a strong and stable protective film formed. Surface analyses via Scanning Electron Microscopy (SEM) coupled with elemental chemical analysis (EDX) confirmed the improved surface morphology of copper in the presence of the extracts. The study not only establishes PP extract as a viable green inhibitor but also emphasizes its potential to replace toxic chemical inhibitors, aligning with global sustainability goals. The combined experimental and density functional theory (DFT) analysis provides a comprehensive understanding of the inhibition mechanism at the molecular level, showcasing the innovation and effectiveness of this eco-friendly approach.