Akademik Veri Yönetim Sistemi
Reviews on Advanced Materials Science, cilt.64, sa.1, 2025 (SCI-Expanded, Scopus)
Phytochemicals are the natural active compounds present in plant sources that act as corrosion inhibitors for various metals subjected to different ecological situations. This phenomenon has inspired to do research work to find natural inhibitors for replacing synthetic chemical inhibitors for the alleviation of corrosion effects on various metals and alloys in aqueous medium. The phytochemical compounds like alkaloids, flavonoids, phenols, tannins, and coumarins from various plant sources, such as Aleo vera, Polyalthia longifolia (PL), olive leaf extract, Phyllanthus amarus, Glycyrrhiza glabra, Salvia officinalis, Triticum aestivum, Ilex kukicha, etc., have the potential to overcome the corrosion effect prejudiced by acid, alkali, and microbially influenced corrosion on metallic surfaces. The adsorption chemistry reveals that the anti-corrosive effect on the metal surface is driven by the functional groups such as primary amide, hydroxyl, ester, carboxylic acid, and amino groups, followed by chemisorption and physisorption mechanisms, which are confirmed through the Langmuir Isotherm model and multi-layer isotherm model. The corrosion inhibition efficiency of plant extracts is majorly elucidated by electrochemical analysis (polarization, impedance and anti-corrosion effect), weight loss measurement, and surface characterization properties by atomic force microscopy and scanning electron microscopy-energy dispersive X-ray spectroscopy methods. The plant extract discussed in this review article obtained corrosion inhibition efficiency and current density (Icorr) by Plantago ovation at 60°C of around 94.4% and 10−5 A·cm−2, respectively. This review article discusses the various sources of corrosion and their mechanisms, different types of phytochemical compounds, the performance of the anti-corrosion effect, the adsorption mechanism of phytochemical constituents on metal surfaces and methods used for evaluating the inhibition process using computational tools.