Inhibition of corrosion of mild steel by an alcoholic extract of a seaweed Sargassum muticum
S. Jone Kirubavathy, Hashem Abdulhameed Al, Rajendran Santhammal, R. M. Joany, Časlav Lačnjevac
Abstract
An alcoholic extract of a sea weed Sargassum muticum has been used to control corrosion of mild steel in 0.5 N HCl. Weight loss method and Electrochemical studies have been used in this study. Weight loss study reveals that 500 ppm of the inhibitor offers 99.25 % inhibition efficiency. Polarization study reveals that the inhibitor functions as an anodic inhibitor at higher concentration. The AC impedance spectra confirm the formation of a protective film on the metal surface. Adsorption of inhibitor molecules on the metal surface follows Langmuir adsorption isotherm.
Topics & Concepts
SargassumAdsorptionMetalCorrosionLangmuir adsorption modelElectrochemistryCorrosion inhibitorChemistryWeedNuclear chemistryAlgaeBotanyElectrodeBiologyOrganic chemistryPhysical chemistryCorrosion Behavior and InhibitionConcrete Corrosion and DurabilityHydrogen embrittlement and corrosion behaviors in metals