Sustainable Corrosion Inhibition: Maceration of Green Tea Waste for Improved Performance—An Electrochemical and Theoretical Exploration

• Published in: Journal of bio- and tribo-corrosion 2024-09, Vol.10 (3), Article 45
• Main Authors: Bouhouche, Ichraq, Bouiti, Khalid, Chraka, Anas, El Hamil, Abdelilah, Labjar, Najoua, Damour, Houda, Dahrouch, Abdelouahed, Nasrellah, Hamid, Benmessaoud, Mohammed, El Hajjaji, Souad
• Format: Article
• Language: English
• Subjects: Adsorption; Biomaterials; Catechin; Chemistry and Materials Science; Correlation; Corrosion; Corrosion and Coatings; Corrosion inhibitors; Efficiency; Ferric oxide; Green tea; Maceration; Materials Science; Molecular structure; Quantum chemistry; Scanning electron microscopy; Solid Mechanics; Surface chemistry; Tea; Time dependence; Tribology
• ISSN: 2198-4220; 2198-4239
• DOI: 10.1007/s40735-024-00847-z

The investigation deals the potential of hydro-ethanolic extracts from green tea waste as C38 inhibitors in a hydrochloride environment. This research focuses on both cold and hot maceration methods and explores the influence of extract concentration on inhibitory efficiency. The results reveal a substantial positive correlation between extract concentration and corrosion inhibition. Inhibitory efficiency values, as measured by inhibition efficiency (IE EIS and IE PDP ) exhibit remarkable effectiveness, with values reaching 93.89% and 96.52% for THC and THF extracts and 96.61% and 98.39% for the respective Tafel curves. These findings suggest that higher extract concentrations enhance corrosion inhibition through the adsorption of extracts adsorption, conforming to the model of Langmuir. This process leads to a progressive rise in R ct over time. Notably, the peak inhibitory efficiency is attained after 8 h, indicating a time-dependent corrosion inhibition process. The gravimetric test was also performed in the absence and presence of inhibitors after immersion for 2 h. The results obtained confirmed the inhibitory capacity of the extracts tested. Scanning electron microscopy analysis substantiates the adsorption mechanism. In sum, the study unequivocally demonstrates the inhibitory capabilities of the treated green tea waste extracts against C38 steel corrosion in a hydrochloride medium. The inhibitor, HCl and water interaction with iron surface was analyzed using theoretical methods, such as DFT as well as MC simulation. Catechin adsorbs on the Fe (1 1 0) and Fe 2 O 3 (110) surfaces in a paralleled model to reach the largest coverage area. Quantum chemical calculations (DFT) also thoroughly investigate the active adsorption sites of the Catechin molecule. In general, our results indicate that DFT calculations correlate well with MC simulations and experimental measurements, and they demonstrate a strong correlation between the inhibitory efficacy of the examined catechin and its molecular structure. Graphical Abstract