Inhibition of Pipeline Steel Corrosion in 0.5 M HCL using Ethanolic Extract of Citrus Sinensis Seeds

Abstract

ISSN: 2582-3353 Abstract: Inhibitive action of ethanolic extract of Citrus sinensis seeds on the corrosion of pipeline steel in monobasic acid medium (0.5 M HCl) was studied using gravimetric method. Adsorption isotherm models were mainly used to elucidate the inhibition mechanism of ethanolic extract of Citrus sinensis seeds in 0.5 M HCl. Surface morphology of pipeline steel before and after inhibition were studied by scanning electron microscope (SEM). Results obtained showed that Citrus sinensis seed extract inhibited pipeline steel corrosion in 0.5 M HCl environment. The corrosion inhibition efficiency increased with increased concentration of the Citrus sinensis seed extract and decreased with raise in environmental temperature in the acidic medium. The corrosion inhibition data fitted better into Freundlich adsorption model, while the presence of the extract gave a smoother corrosion surface morphology.