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An Exemplar Imidazoline Surfactant for Corrosion Inhibitor Studies: Synthesis, Characterization, and Physicochemical Properties
Author(s) -
Kousar Kiran,
Ljungdahl Thomas,
Wetzel Alexander,
Dowhyj Michael,
Oskarsson Hans,
Walton Alex S.,
Walczak Monika S.,
Lindsay Robert
Publication year - 2020
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1002/jsde.12363
Subject(s) - chemistry , hydrochloric acid , pulmonary surfactant , corrosion , adsorption , critical micelle concentration , hydrolysis , aqueous solution , inorganic chemistry , fourier transform infrared spectroscopy , infrared spectroscopy , sulfuric acid , micelle , nuclear chemistry , organic chemistry , chemical engineering , biochemistry , engineering
An optimized one‐pot recipe has been developed to synthesize a surfactant molecule, referred to as OMID, consisting of an imidazoline head group and aliphatic tail, which is an exemplar corrosion inhibitor for carbon steel in acidic solutions. As evidenced by gas chromatography, 1 H and 13 C nuclear magnetic resonance, and Fourier‐transform infrared data, a high‐purity product was achieved without the use of either a solvent or catalyst. Critical micelle concentration values and corrosion inhibition efficiencies ( η %) were determined in aqueous solutions of hydrochloric acid and sulfuric acid using surface tensiometry and linear polarization resistance measurements, respectively. Hydrolysis of the imidazoline head group as a function of pH (0–11) was explored with ultraviolet–visible absorption spectroscopy. In addition, N 1s and C 1s X‐ray photoelectron spectroscopy data were acquired from both surface‐adsorbed OMID and a multilayer of the imidazoline head group of OMID. These latter data are highly relevant to those attempting to understand OMID inhibition chemistry.