Adsorption and inhibition behavior of imidazolium tetrafluoroborate derivatives as green corrosion inhibitors for carbon steel

Tian, Guocai; Yuan, Kaitao

doi:10.1007/s00894-021-04794-1

Cited by 16 publications

(6 citation statements)

References 70 publications

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“…The order of χ and ω is [BMIM]HSO 4 > [HMIM]HSO 4 > [OMIM]HSO 4 , which is also consistent with the order of experimental inhibition efficiency. Softness (σ) and hardness (η) are essential molecular properties for analyzing the reactivity and selectivity [27]. A lower η value and higher σ value represent that the reactivity and selectivity of molecules could be better.…”

Section: Global Reactivity For Fur Ils In Gas Phasementioning

confidence: 99%

Performance and Mechanism of Alkylimidazolium Ionic Liquids as Corrosion Inhibitors for Copper in Sulfuric Acid Solution

Tian

Yuan

2021

Molecules

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The addition of corrosion inhibitors is an economic and environmental protection method to prevent the corrosion of copper. The adsorption, performance, and mechanism of three 1-alkyl-3-methylimidazolium hydrogen sulfate ([BMIM]HSO4, [HMIM]HSO4, and [OMIM]HSO4) ionic liquids (ILs) on the copper surface in 0.5 M H2SO4 solutions were studied by quantum chemical calculation, quantitative structure-activity relationship (QSAR), and molecular dynamics simulation. It is found that the main reactive site is located on the imidazolium ring (especially the C2, N4, and N7 groups). When the alkyl chain of the imidazolium ring is increasing, the molecular reactivity of the ILs and the interaction between the ILs inhibitor and copper surface are enhanced. The imidazole ring of the ILs tends to be adsorbed on Cu (111) surface in parallel through physical adsorption. The order of adsorption energy is [Bmim]HSO4 < [Hmim]HSO4 < [OMIM]HSO4, which is in agreement with the experimental order of corrosion efficiency. On the imidazole ring, the interaction between the copper surface and the C atom is greater than that between the copper surface and the N atom. It is found that ILs addition can hinder the diffusion of corrosion particles, reduce the number density of corrosion particles and slow down the corrosion rate. The order of inhibition ability of three ILs is [Bmim]HSO4 < [Hmim]HSO4 < [OMIM]HSO4,which agree well with experimental results. A reliable QSAR correlation between the inhibition corrosion efficiency and molecular reactivity parameters of the ILs was established.

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Section: Global Reactivity For Fur Ils In Gas Phasementioning

confidence: 99%

Performance and Mechanism of Alkylimidazolium Ionic Liquids as Corrosion Inhibitors for Copper in Sulfuric Acid Solution

Tian

Yuan

2021

Molecules

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“…Notwithstanding, these compounds represent potential danger for the health, for they are highly toxic chemicals . Currently, environmental regulations concerning the use of chemical substances have limited the application of toxic compounds, which has led to the synthesis of low-toxicity CIs that are easy to handle and biodegradable, i.e., more environmentally friendly like the compounds known as ILs. , These molecules are salts consisting of organic or inorganic anions and organic cations that display, in general, melting points below 100 °C, i.e., these are liquids at ambient temperature and possess unique features that stem from the arrangement and chemical distribution of their ions; in addition, the ILs have negligible vapor pressure, thermal stability, nonflammability, high ionic conductivity, and wide electrochemical stability spectrum. − …”

Section: Introductionmentioning

confidence: 99%

Investigation of Sulfonium-Iodide-Based Ionic Liquids to Inhibit Corrosion of API 5L X52 Steel in Different Flow Regimes in Acid Medium

et al. 2022

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The present work deals with the corrosion inhibition mechanism of API 5L X52 steel in 1 M H2SO4 employing the ionic liquid (IL) decyl(dimethyl)sulfonium iodide [DDMS+I–]. Such a mechanism was elicited by the polarization resistance (R p), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) techniques, both in stationary and dynamic states. The electrochemical results indicated that the corrosion inhibition was controlled by a charge transfer process and that the IL behaved as a mixed-type corrosion inhibitor (CI) with anodic preference. The experimental results revealed maximal inhibition efficiency (IE) rates up to 93% at 150 ppm in the stationary state, whereas in turbulent flow, the IE fell to 65% due to the formation of microvortexes that promoted higher desorption of IL molecules from the surface. The Gibbs free energy of adsorption (ΔG°ads) value of −34.89 kJ mol–1, obtained through the Langmuir isotherm, indicated the formation of an IL monolayer on the metal surface by combining physisorption and chemisorption. The surface analysis techniques confirmed the presence of Fe x O y , FeOOH, and IL on the surface and showed that corrosion damage diminished in the presence of IL. Furthermore, the quantum chemistry calculations (DFT) indicated that the iodide anion hosted most of the highest occupied molecular orbital (HOMO), which eased its adsorption on the anodic sites, preventing the deposition of sulfate ions on the electrode surface.

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“…Although carboxylate anions had shown effective wear reduction in nonpolar oils, 34 they had trouble in the polar PAG and OSP oils in this study, resulting in accelerated wear loss rather than surface protection, though the exact wear mechanism remains to be determined. On the other hand, cations also repeatedly demonstrated their strong influence on surface interactions, thus affecting the corrosion 61,62 and tribological behavior. 10,27,28,35,57 In this work, when paired with similar phosphate anions, ammonium cations consistently had more effective friction reduction and wear protection than phosphonium cations, such as Although all ILs in this work had no solubility issues in the polar PAG or polar OSP oils, solubility could be a limiting factor for nonpolar oils.…”

Section: ■ Discussionmentioning

confidence: 99%

Minimizing Toxicity and Optimizing Lubricity of Ionic Liquids for Eco-Friendly Lubrication

He,

Luo,

Mathews

et al. 2024

ACS Sustainable Chem. Eng.

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As much as 60 million liters of lubricating fluids end up in the environment annually, and thus, the environmental impact of lubricants is increasingly recognized in addition to meeting the rheological and tribological requirements. Although US Environmental Protection Agency-approved environmentally acceptable base fluids are available, there is a lack of additives that are both nontoxic and effective in wear protection. This study reports the successful development of a new class of ionic liquids (ILs) with demonstrated significantly lower aquatic toxicity and superior friction reduction and wear protection capabilities compared with a commercial lubricant additive and some ILs reported in the literature. Specifically, ammonium phosphate and phosphonium phosphate ILs with four-carbon alkyls have been identified with balanced oil solubility, thermal stability, toxicity, and lubricity, which provide fundamental insights for future development of eco-friendly ILs.

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Adsorption and inhibition behavior of imidazolium tetrafluoroborate derivatives as green corrosion inhibitors for carbon steel

Cited by 16 publications

References 70 publications

Performance and Mechanism of Alkylimidazolium Ionic Liquids as Corrosion Inhibitors for Copper in Sulfuric Acid Solution

Performance and Mechanism of Alkylimidazolium Ionic Liquids as Corrosion Inhibitors for Copper in Sulfuric Acid Solution

Investigation of Sulfonium-Iodide-Based Ionic Liquids to Inhibit Corrosion of API 5L X52 Steel in Different Flow Regimes in Acid Medium

Minimizing Toxicity and Optimizing Lubricity of Ionic Liquids for Eco-Friendly Lubrication

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