Corrosion inhibition of carbon steel in hydrochloric acid: Elucidating the performance of an imidazoline-based surfactant

Kiran Kousar, Michal Walczak, T Ljungdahl, A Wetzel, H Oskarsson, P Restuccia, E A Ahmad, N M Harrison, Rob Lindsay

Research output: Contribution to journalArticlepeer-review

Abstract

A combination of electrochemical measurement and interface analysis have been applied to characterise the interaction of OMID, an exemplar imidazoline-based corrosion inhibitor, with carbon steel in 1 M hydrochloric acid. Corrosion inhibition efficiency data indicate that excellent performance is achieved well below the critical micelle concentration. High resolution X-ray photoelectron spectra demonstrate that, as the corrosion rate decreases, the interface evolves towards one comprising OMID bound to film-free carbon steel. This latter result provides key input for those researchers attempting to predict corrosion inhibitor functionality through atomic scale interfacial modelling, and so identify next generation chemistries.
Original languageEnglish
JournalCorrosion Science
Publication statusAccepted/In press - 14 Dec 2020

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