Corrosion Inhibition Performances of Imidazole Derivatives-Based New Ionic Liquids on Carbon Steel in Brackish Water

Abstract

In this study, imidazole derivative-based new ionic liquids were investigated as corrosion inhibitors. These new ionic liquids (ILs) are 1,3-dipropyl-2-(2-propoxyphenyl)-4,5-diphenylimidazole iodide (IL1) and 1,3-dibutyl-2-(2-butoxyphenyl)-4,5-diphenylimidazole iodide (IL2). The corrosion inhibition effects of two new ILs were observed on carbon steel in brackish water media (1% NaCl solution). Carbon steel coupons were exposed to 1% NaCl solution with various concentrations of ILs. Corrosion inhibition effects were tested by the electrochemical impedance spectroscopy (EIS) method and the Tafel method at various temperatures ranging from 25 °C to 55 °C. The results showed that ILs have potential as corrosion inhibitors and the adsorption mechanisms of IL1 and IL2 on carbon steel surfaces were also determined, which followed the Langmuir adsorption isotherm model. Acquisition of ∆Gads values of IL1 and IL2 were −35.04 and −34.04 kJ/mol, respectively. The thermodynamic data of the ILs show that semi-chemical and or physical adsorptions occurred on carbon steel surfaces.

Advance of glucose conversion to 5-hydroxymethylfurfural using ionic liquid: mini review

“…It can be reasoned that the reaction partly happened, and the separation is not optimal in the organic solvent. On the other hand, the organic solvent is many disadvantages if used in glucose conversion industrially, such as flammable, volatile, high volume usage, high operational cost, and high toxicity impact [27]- [30]. Moreover, they give low HMF yield while adding additional challenges at product separation, regenerating, and recycling organic solvent [27].…”

“…On the other hand, the organic solvent is many disadvantages if used in glucose conversion industrially, such as flammable, volatile, high volume usage, high operational cost, and high toxicity impact [27]- [30]. Moreover, they give low HMF yield while adding additional challenges at product separation, regenerating, and recycling organic solvent [27]. The difficulty regarding product separation is tied to low solubility in the aqueous phase, resulting in low HMF yield [27].…”

“…Moreover, they give low HMF yield while adding additional challenges at product separation, regenerating, and recycling organic solvent [27]. The difficulty regarding product separation is tied to low solubility in the aqueous phase, resulting in low HMF yield [27]. Based on this problem, an alternative is needed to substitute organic solvent in biomass conversion, and one of the potential solutions is by using ionic liquid (IL) [29], [31].…”

Effect of Imidazole as Corrosion Inhibitor on Carbon Steel Weldment in District Heating Water

“…Therefore, research has been actively conducted on environmentally friendly corrosion inhibitors [ 12 , 13 , 14 ]. Among them, imidazole and its derivatives, considered “green” corrosion inhibitors with nontoxic properties, have been studied as corrosion inhibitors for iron and copper [ 15 , 16 , 17 , 18 , 19 , 20 ]. Many studies have been conducted on the corrosion inhibition performance of imidazole in acidic environments such as in the piping of a petrochemicals plant [ 21 , 22 ].…”

Synthesis, characterization and corrosion inhibition study of 2-(α-hydroxyethyl)benzimidazole: A green corrosion inhibitor

“…In recent decades, the research is more focused towards the development of the "new green corrosion inhibitors", which exhibit better inhibition property with lesser environmental problems [1][2][3][4][5]. The compounds such as flavonoids, alkaloids and other natural products as well as synthetic organic compounds with negligible toxicity are considered and used as an organic green corrosion inhibitors [6,7].…”