Abstract
Abstract The present paper is aimed to review the efficiency of eco-friendly, natural and cheap bio-waste materials as corrosion inhibitors on metal surfaces in different corrosive media. Various bio-waste materials are the best substitutes for the synthetic organic, inorganic and polymeric inhibitors. Most of the bio-waste material adsorbed on the metal surface in aqueous medium followed the Langmuir adsorption isotherm. The presence of organic constituents in bio-waste materials is responsible for the protection of metals in aggressive medium. The effectiveness of these bio-waste materials to inhibit metal corrosion is well studied by non-electrochemical methods like weight loss and atomic absorption spectroscopy techniques as well as electrochemical methods like polarization and impedance measurements. Surface studies were studied through SEM, EDS, XRD, AFM and XPS techniques. Computational studies using DFT and MDS were also reported.
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