期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2018
卷号：9
期号：4
页码：1212-1222
出版社：University of Mohammed Premier Oujda
摘要：The extracted lipid of Lepidium sativum L was examined for fatty acidcomposition. Oleic (22.03 g/100 g) and Linolenic (29.22 g/100 g) acids werethe predominant unsaturated fatty acids, while palmitic acid (8.03 g/100 g) wasfound as the major saturated acid. The inhibition of the corrosion of carbon steelin hydrochloric acid medium by Lepidium sativum L oil has been studied usingweight loss, electrochemical impedance spectroscopy (EIS) and Tafelpolarisation methods. Inhibition was found to increase with increasingconcentration of the oil but decreases with temperature. Polarization curvesshowed that Lepidium sativum L oil behaves as a mixed-type inhibitor. Theadsorption of the oil on the carbon steel surface obeyed the Langmuiradsorption isotherm. The thermodynamic parameters for activation processeswere calculated and discussed. Values of inhibition efficiency calculated fromweight loss, potentiodynamic polarization, and electrochemical impedancespectroscopy are in good agreement.
关键词：Fatty acid;composition; Inhibition; Carbon Steel; HCl; Lepidium sativum L
