Corrosion inhibition of mild steel by imidazolines and their precursors in a carbon dioxide (CO2)-containing environment was studied using rotating cylinder electrode (RCE) and linear polarization resistance (LPR) techniques. Corrosion rate-time/concentration profiles and minimum effective concentrations obtained for a series of imidazolines and amides were evaluated in terms of the respective contributions of their constituent parts (imidazoline ring, amide/amine group, and hydrocarbon chain) to overall corrosion inhibition. Formation of the inhibitor film was studied in terms of the bilayer/multilayer film model.

Subject
Corrosion rate, Inhibitor films, Imidazolines, Surfactants, Constants, Amines, Film formation, Inhibitor treatment, Amide, Corrosion inhibitors, Brines, Hydrolysis, Hydrocarbons
Keywords:
amide, amine, bilayer, brine, carbon dioxide corrosion, films, imidazoline, inhibitors, linear polarization resistance, mild steel
NACE International
1999
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