Corrosion Inhibition of API 5L Carbon Steel by Nettle Leaves Hydroalcoholic Extract in a 0.5 M H2SO4 Solution

Document Type: Research Paper

Authors

Department of Materials Engineering, Bu-Ali Sina University, Hamedan 65178-38695, Iran

Abstract

In this work, electrochemical methods such as Tafel polarization and electrochemical impedance spectroscopy (EIS) were used to study the inhibition efficiency of Nettle leaves hydroalcoholic extract as a green corrosion inhibitor of API 5L carbon steel in 0.5 M H2SO4 solution. The results showed that the inhibition efficiency was increased with increasing the concentration of the extract and the maximum inhibition efficiency in the concentration of 6 g/L was 96%. The negative sign 0 ΔGads absorption of inhibitor on the steel surface was spontaneous and the value 0 ads ΔG represented the physical absorption of the inhibitor which followed the Langmuir isotherm.

Keywords


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