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A pH stabilization method was investigated to mitigate corrosion in aqueous 5M monoethanolamine for post-combustion CO2 capture. The room temperature pH of a naturally aerated CO2-loaded solution (i.e., 9.7) was adjusted with NaHCO3 powders to 9.3 and 9.1, and its effect on corrosion of A106 carbon steel was studied. Lower pH initially accelerated corrosion but promoted protective FeCO3 layer formation...
Carbon steel A106 with an aluminized Ni coating was tested in a 5mol/l (M) monoethanolamine (MEA) with a carbon loading of 0.2mol/mol MEA at 80°C using polarization resistance, Tafel, and electrochemical impedance spectroscopy (EIS) techniques. Surface morphology and elemental line profile of the coating were examined before and after a 900°C heat-treatment in atmosphere environment. X-ray diffraction...
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