An Exemplar Imidazoline Surfactant for Corrosion Inhibitor Studies: Synthesis, Characterisation and Physicochemical properties

Kiran Kousar, T. Ljungdahl, A Wetzel, Michael Dowhyj, H Oskarsson, Alex Walton, Michal Walczak, Rob Lindsay

Research output: Contribution to journalArticlepeer-review

Abstract

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 (GC), 1H and 13C nuclear magnetic resonance (NMR), and Fourier-transform infra-red (FTIR) data, a high purity product was achieved without the employment of either a solvent or catalyst. Critical micelle concentration (CMC) values and corrosion inhibition efficiencies (%) were determined in aqueous solutions of hydrochloric acid and sulfuric acid, using surface tensiometry and linear polarization resistance (LPR) measurements, respectively. Hydrolysis of the imidazoline head group as a function of pH (0 – 11) was explored with ultraviolet-visible (UV-Vis) absorption spectroscopy. In addition, N 1s and C 1s X-ray photoelectron spectroscopy (XPS) data were acquired from both surface adsorbed OMID and a multilayer of the imidazoline head group of OMID (HG-OMID). These latter data are highly relevant to those attempting to understand OMID inhibition chemistry.
Original languageEnglish
JournalJournal of Surfactants and Detergents
Publication statusAccepted/In press - 21 Oct 2019

Keywords

  • imidazoline
  • corrosion inhibitor
  • synthesis
  • carbon steel

Research Beacons, Institutes and Platforms

  • Photon Science Institute

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