Abstract
This work investigated corrosion of carbon steel in the CO2 capture process using various types of CO2 absorption solvents. The tested solvents included monoethanolamine (MEA), diethanolamine (DEA), methyl diethanolamine (MDEA), 2-amino-2-methyl-1-propanol (AMP), piperazine (PZ), and their blends. A series of laboratory corrosion tests was carried out using electrochemical techniques (cyclic potentiodynamic polarization and impedance measurements) under CO2 saturation and 80°C for most experiments. Results show that the corrosivity order for the single amine systems was MEA > AMP > DEA > PZ > MDEA while the corrosivity order for blended amine systems was MEA- - -MDEA > MDEA-PZ > AMP-PZ.
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