Benign Approach of Plant-Derived Inhibitor: Assessing Their Anticorrosive Activity on Mild Steel in Acidic Media

Abstract

The dissolution behavior of mild steel in 2 M H2SO4 with various concentrations of Borassus Flabellifer Seed Food (BFSF), Musa Paradisiaca Dry Leaf (MPDL), and Saccharum Officinarum Bagasse (SOB) was evaluated using both mass loss and electrochemical methods. It is evident from the results that the biomaterial extracts could be precious inhibitors for the corrosion of mild steel in sulfuric acid media. The inhibition efficiency of the tested inhibitors enhanced with increase in BFSF, MPDL, and SOB concentrations but diminished with increasing temperature. The free energy of the adsorption, apparent activation energy, enthalpy, and entropy of the dissolution process were discussed at 35–60 °C. Impedance curves showed that the charge transfer resistance increased and double-layer capacitance decreased with increase in concentration of tested inhibitors. Scanning electron microscope images revealed that the damage of mild steel surface has diminished in the presence of BFSF, MPDL, and SOB.