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Anissa Acidi,Azzedine Abbaci,Muhammad Hasib-ur-Rahman,Faiçal Larachi 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.6
We present the viability of using thermally stable, practically non-volatile ionic liquids as corrosion inhibitorsin aqueous monoethanolamine systems. Carbon steel 1020, which is widely used as a construction material in CO2capture plants, has been taken as a test material. Corrosion inhibition capabilities of typical room-temperature ionicliquids constituting imidazolium cation in concentration range ≤3% in CO2 capture applications were investigated. Electrochemical corrosion experiments using the potentiodynamic polarization technique for measuring corrosion currentwere carried out. Subsequent calculation of corrosion rate via Tafel fit was performed. The experimental findingssuggest that the corrosion rate is significantly dependent on the process parameters, such as the CO2 loading and thepresence of oxygen. In addition, the value of the corrosion rate is sensitive to the type of ionic liquid added. Moreover,the results show that ionic liquids possess the ability of suppressing severe operational problems of corrosion in typicalCO2 capture plants to a reasonable extent (≥50%).