Extraction and chemical composition of Tetraclinis articulata (Vahl) mast oil: Oil's value as a natural antioxidant and environmentally benign inhibitor of mild steel corrosion in HCl

¹ Higher Institute of Nurses Professions and Health Techniques of Agadir, Annex of Guelmim – Morocco.
² Laboratory of Materials, Nanotechnology and Environment, Faculty of Sciences, Mohammed V University in Rabat, Av. Ibn Battouta, Agdal-Rabat P.O. Box. 1014, Morocco.
³ Laboratory of Applied Chemistry and Environment (LCAE), Faculty of Sciences, Mohammed First University, Oujda 60000, Morocco
⁴ Higher Institute of Nursing Professions and Health Techniques (ISPITSO), Oujda, Morocco.
⁵ Natural Resources and Environment Laboratory, Biology Chemistry Geology Department, Polydisciplinary Faculty of Taza, Sidi Mohamed Ben Abdellah University, Fez 30050, Morocco.
⁶ Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Ajman University, PO Box: 346 Ajman, UAE.
⁷ Department of Biology, Mohammed v University, Faculty of Science, Rabat, Morocco
⁸ Polydisciplinary Faculty of Khouribga, Sultan Moulay Slimane University of Beni Mellal, 25000, Morocco
⁹ Laboratory for Improvement of Agricultural Production, Biotechnology and Environment (LAPABE)/Water, Environment and Health Team, Faculty of Science, Mohamed 1st University, 717 60000, BV M6, Oujda-Morocco.
¹⁰ Biotechnology, Environmental Technology and Valorization of Bio-resources team, Department of Biology, Faculty of Science and Technology Al-Hoceima, Abdelmalek Essaadi University, Morocco

^* Corresponding author: y.elouadi@ump.ac.ma

Abstract

This research aims to address three distinct aspects. Initially, it seeks to extract and characterize the chemical components of Tetraclinis articulata (Vahl) mast leaf oil. Subsequently, it evaluates the oil's antioxidant properties. Lastly, it examines the oil's ability to inhibit mild steel corrosion in 1M HCl through electrochemical methods. The oil's chemical analysis reveals various fatty acids, with 9,12-octadecadienoic acid and methyl ester being the predominant compounds (50.86%). The oil demonstrates a DPPH scavenging ability of 85%, comparable to ascorbic acid's 93%. The corrosion-inhibiting properties of Tetraclinis articulata (Vahl) mast leaf oil on mild steel in a molar acid environment were evaluated through weight loss measurements, electrochemical impedance spectroscopy (EIS), and Tafel polarization curves. The results hint that the oil's effectiveness boosts with concentration, reaching 89.4% at 0.8 g/L. Temperature influences were also scrutinized, and the associated thermodynamic parameters were figured and dissected.