Electrochemical Studies of Erica arborea Extract as a Green Corrosion Inhibitor for C-steel in Sulfuric Acid Medium
Unknown authors
Abstract
The carbon steel (CS) corrosion inhibition in H2SO4 media by Erica arborea leaves (EA) extract as a sustainable green inhibitor was described here. The mass loss technique (ML), potentiodynamic polarization (PDP), electrochemical frequency modulation (EFM), and electrochemical impedance spectroscopy were all used in this investigation (EIS). In addition, Atomic Force Microscopy was also used to examine the metal surface morphology (AFM). The EIS demonstrated that the Erica arborea extract generated a thin protective coating on the metal surface and that utilizing 1000 ppm of Erica arborea extract allows for 93.4 % corrosion inhibition effectiveness (CIE). According to the PDP curves, the Erica arborea extracts act as a mixed-type inhibitor. It was discovered that the inhibition efficiency increased as the Erica arborea extract dosages increased. The system's kinetic characteristics and thermodynamic adsorption have also been measured and investigated. The results collected demonstrated that Erica arborea adsorption on metal surfaces followed the Langmuir isotherm and that the Erica arborea extract operates via physisorption according to the activation energy (Ea*). The findings of disparate measurements were in good agreement.