Corrosion Inhibition of API 5L X52 Carbon Steel by 1-Ethyl-3-methylimidazolium-methanesulphonate and 1-Ethyl-3-methylimidazolium Acetate Ionic Liquids in Hydrochloric Acid

• Autorzy: Ikpi Magdalene Edet , Obono Okama Ebri

Identyfikatory

DOI

10.24425/amm.2020.131730

• Języki publikacji: EN

Abstrakty

EN

The corrosion inhibition behaviour of 1-Ethyl-3-methylimidazolium-methanesulphonate (EMIM[MS]) and 1-Ethyl-3-methylimidazolium acetate (EMIM[Ac]) on API 5LX-52 carbon steel in 2 M HCl was investigated using weight loss, potentiodynamic polarization and electrochemical impedance methods. The corrosion rates of carbon steel decreased in the presence of these ionic liquids. The inhibition efficiencies of the compounds increased with concentration and showed a marginal decrease with a 10°C increase in temperature. Polarization studies showed the compounds to be mixed type inhibitors with stronger anodic character. The adsorption mechanism of both compounds on the metal surface was via physical adsorption and the process obeyed the El-Awardy kinetic-thermodynamic model. The associated activation energy of corrosion and other thermodynamic parameters were calculated to elaborate on the thermodynamics and mechanism of the corrosion inhibition process. EMIM[MS] was found to inhibit the corrosion of carbon steel better than EMIM[Ac] and is attributed to the presence of the highly electronegative sulphur atom in its structure and its larger molecular size.

Słowa kluczowe

EN

corrosion inhibition; carbon steel; ionic liquids; potentiodynamic polarization; electrochemical impedance

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2020
• Tom: Vol. 65, iss. 1
• Strony: 295--304
• Opis fizyczny: Bibliogr. 39 poz., rys., tab., wzory

Twórcy

autor

Ikpi Magdalene Edet

• Corrosion and Electrochemistry Research Laboratory, Department of Pure and Applied Chemistry, University of Calabar, Calabar-Nigeria

autor

Obono Okama Ebri

• Corrosion and Electrochemistry Research Laboratory, Department of Pure and Applied Chemistry, University of Calabar, Calabar-Nigeria

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Uwagi

EN

1. This work was supported by China-Africa Science and Technology Partnership Program (CASTEP).

PL

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).