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Adsorption and Corrosion Inhibition Performance by Three New Ionic Liquids on API 5L X52 Steel Surface in Acid Media

Octavio Olivares‐XometlFacultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, Av. San Claudio, Ciudad Universitaria. Col. San Manuel, Puebla Pue. 72570, MexicoClaudia López-AguilarFacultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, Av. San Claudio, Ciudad Universitaria. Col. San Manuel, Puebla Pue. 72570, MexicoPilar Herrastí-GonzálezDepartmento de Química Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente, 7, Cantoblanco, Madrid 28049 SpainNatalya V. LikhanovaPrograma de Investigación y Posgrado, Instituto Mexicano del Petróleo , Eje Central Lázaro Cárdenas No. 152, Col. San Bartolo Atepehuacán, Mexico, D.F. 07730, MexicoIrina V. LijanovaInstituto Politécnico Nacional, Centro de Investigación e Innovación Tecnológica, Cerrada Cecati S/N, Colonia Santa Catarina, Azcapotzalco, Mexico, D.F. CP 02250, MexicoRafael Martínez‐PalouPrograma de Investigación y Posgrado, Instituto Mexicano del Petróleo , Eje Central Lázaro Cárdenas No. 152, Col. San Bartolo Atepehuacán, Mexico, D.F. 07730, MexicoJ. Antonio Rivera-MárquezFacultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, Av. San Claudio, Ciudad Universitaria. Col. San Manuel, Puebla Pue. 72570, Mexico

2014en

ABI

Annotatsiya

In the present work, three new ionic liquids (ILs) were tested as corrosion inhibitors (CIs): 1,2-dimethyl-3-decylimidazole iodide (DDI), N-triethyl methylammonium acetate (TMA) and N-triethyl methylammonium laurate (TML). The tests were carried out in 1.0 M solutions of sulfuric acid (H2SO4) and hydrochloric acid (HCL) in order to inhibit the corrosion of API 5L X-52 steel. The corrosion inhibitors (CIs) were evaluated by Tafel polarization and polarization resistance (RP). The Tafel polarization results confirmed that DDI, TMA, and TML inhibited the steel corrosion and worked as mixed inhibitors in both corrosive media. In 1.0 M H2SO4, DDI featured the best inhibition efficiency (IE), which ranged from 57 to 95%, whereas TMA in 1.0 M HCl showed the best IE, which was within the 30–70% range. The IE obtained by RP in 1.0 M H2SO4 was increased as a function of time, while in 1.0 M HCl, it was inversely proportional. The adsorption displayed by DDI, TMA, and TML on the API 5L X52 steel surface was both physical and chemical, which was obtained from different adsorption isotherms.

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DOI: 10.1021/ie4035847

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