Adsorption and performance of ammonium-based ionic liquids as corrosion inhibitors of steel

Arellanes-Lozada, Paulina; Olivares‐Xometl, Octavio; Likhanova, Natalya V.; Lijanova, Irina V.; Vargas-Garcı́a, J.R.; Hernández-Ramírez, Raquel E.

doi:10.1016/j.molliq.2018.04.153

Cited by 125 publications

(40 citation statements)

References 64 publications

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“…The O peak was located at 532.1 eV and attributed to metal oxide species. Alternatively, the Cl 2p signal can be deconvoluted into two peaks for both samples at 198.1 and 199.5, which indicates that Cl − anions had interacted with the substrate [ 53 ]. The atomic percentages of these signals are presented in Table 4 .…”

Section: Resultsmentioning

confidence: 99%

Imidazolium-Based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl Solution

et al. 2020

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The corrosion inhibition performance of an imidazolium-based ionic liquid (IL), 1-butyl-3-methylimidazolium thiocyanate (BMIm), was studied on AA 6061 alloy in 1 M HCl solution at 303 K, 333 K, and 363 K by gravimetric tests, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) analysis. Scanning electron microscopy with energy dispersive X-ray (SEM-EDX) and X-ray photoelectron spectroscopy (XPS) were used to detect the surface morphologies and chemical composition of the surface films. The results indicate that this IL inhibits AA 6061 corrosion in acid with maximum inhibition efficiencies of 98.2%, 86.6%, and 41.2% obtained at 303 K, 333 K, and 363 K respectively. Inhibition efficiency generally decreased with increasing immersion time; the major exception was at 303 K, whereby the inhibition efficiency was detected to increase with immersion time from 30 to 90 min and then decrease slightly beyond 90 min. The results indicate that BMIm is a mixed-type inhibitor with a predominant effect on cathodic reactions. Surface morphology analyses by SEM revealed less surface damage in the presence of the inhibitor. XPS analysis established the development of a protective film on the AA 6061 surface which was hydrophobic in nature.

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Section: Resultsmentioning

confidence: 99%

Imidazolium-Based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl Solution

et al. 2020

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“…erefore, the simulation of impedance spectra can be performed by replacing the capacitor C with a constant phase element (CPE). e impedance of the CPE is described by the following equation [39]:…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

“…As reported, the adsorption equilibrium constant (K ads ), and the standard adsorption free energy Δ퐺 0 ads are the primary adsorption factors in corrosion inhibition investigations [49,50]. ese two parameters are linked by the following equation [39]:…”

Section: Adsorption Isotherm and Mechanism Of Corrosionmentioning

confidence: 99%

Electrochemical and Thermodynamic Investigation on Corrosion Inhibition of C38 Steel in 1M Hydrochloric Acid Using the Hydro-Alcoholic Extract of Used Coffee Grounds

Bouhlal

Labjar

Abdoun

et al. 2020

International Journal of Corrosion

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The present work investigates the influence of temperature on C38 steel corrosion in a 1 M HCl medium with and without different concentrations of a hydro-alcoholic extract of used coffee grounds (HECG). The potentiodynamic polarization technique and the electrochemical impedance spectroscopy were performed in temperatures ranging from 293.15 to 323.15 K. It was observed that the inhibition efficiency decreased with increased temperature and inhibitor concentration. The HECG adsorption process on C38 steel surface was found to be spontaneous and obeyed to Langmuir isotherm at all studied temperatures. The associated thermodynamic parameters of adsorption led to suggest the occurrence of physical adsorption of the HECG compounds on the C38 steel surface.

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“…where 55.5 is the molar concentration of water, R is the universal gas constant, and T is temperature in Kelvin. Literature researches uncover that the values of Δ ∘ around -20 kJ/mol or less negative than are convenient with the electrostatic interaction between the charged inhibitor molecules and the charged metal surface (physisorption) and those around -40 kJ/mol or more negative (Table 3) than included sharing or charge transfer of electrons between inhibitor molecules and the surface of mild steel to constitute bond of a coordinate type (chemisorption) [45,46]. In this study, all Δ ∘ values calculated (Table 3) for each immersion times are largely more negative than -40 kJ/mol and incorporate chemisorption, charge sharing between inhibitor, and metal surface.…”

Section: Determination Of Adsorptionmentioning

confidence: 99%

The Electrochemical Variation of a Kind of Protein Staining and Food Dye as a New Corrosion Inhibitor on Mild Steel in Acidic Medium

Özkır

2019

International Journal of Electrochemistry

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In this study, the relevance of a food dye, namely, Fast Green-FCF (FG-FCF), was surveyed as a new inhibitor for mild steel in HCl solution. This effect was specified by electrochemical impedance spectroscopy (EIS), one of the most widely used measurement techniques. As a result of the increment of the inhibitor concentration, it was seen that the values of polarization resistance increased and covered the metal surface of FG-FCF like a blanket. Tests endorse that the FG-FCF is chemically adsorbed on mild steel surface, according to the Langmuir isotherm. With surface characteristic analyses, such as field emission scanning electron microscope (FESEM) and atomic force microscope (AFM), it was further determined that the metal surface in HCl of FG-FCF was protected. By applying the hydrogen gas evolution technique, FG-FCF has been proven to provide the lowest surface area with all inhibited solutions from the blank due to its strong adsorption to the metal surface. Finally, it has been clarified that FG-FCF can be practically used as a good corrosion inhibitor for mild steel with the supported results.

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Adsorption and performance of ammonium-based ionic liquids as corrosion inhibitors of steel

Cited by 125 publications

References 64 publications

Imidazolium-Based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl Solution

Imidazolium-Based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl Solution

Electrochemical and Thermodynamic Investigation on Corrosion Inhibition of C38 Steel in 1M Hydrochloric Acid Using the Hydro-Alcoholic Extract of Used Coffee Grounds

The Electrochemical Variation of a Kind of Protein Staining and Food Dye as a New Corrosion Inhibitor on Mild Steel in Acidic Medium

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