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Obtaining ionic liquids based on 2-allyl-4-isododecylphenol and studying their hydrogen sulfide corrosion inhibition property on steel St.3

Year: 2025
Type: article
Abstract: The article presents the results of anticorrosive gravimetric studies of ionic liquids (comp.I and II) obtained by quaternization of aminomethylated derivatives of 2-allyl-4-isododecylphenol with hydrogen chloride (I was obtained based on 2-allyl-4-isododecyl-6-diethylaminomethylphenol, and II was obtained based on 2-allyl-4-isododecyl-6-morpholinomethylphenol.Their structures were determined by NMR spectroscopy.The tests were carried out at the following temperatures (K): 298; 308; 318 and 333.The concentration of I and II was (g/L) 0.05% 0.1 and 0.15.It was found that at a temperature of 298 K and concentration 0.05 g/L, the degree of corrosion protection is ~88.5% (compound I) and 76.0% (compound II).With an increase in their concentration to 0.15 g/L, their inhibitory properties increase and at a temperature of 298 K they are 97.2 and 92.8%, respectively.However, with an increase in temperature to 333 K, the maximum degree of corrosion protection is ~79% (compound I) and 70 (compound II), at their concentration of 0.15 g/L.Based on the obtained results, a blocking, chemisorption mechanism of protection of the surface of steel St.3 from corrosion by the tested compounds containing in the aromatic ring along with allyl, isododecyl and hydroxyl groups, also a bulky amine cation and chloride anion is proposed.High inhibitory properties of the studied practically non-volatile compounds are also confirmed by data on the areas of filling () with them, as well as by the calculated thermodynamic parameters of the adsorption processes (Gads, Nads, Sads).Negative values of Gads indicate spontaneous chemisorption on the metal surface
Source: PPOR
Language: English
Open Access status: bronze
OpenAlex ID: W4414907318
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