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51313-02345-Corrosion Mechanisms of Carbon Steel in MDEA-Based CO2 Capture Plants

Product Number: 51313-02345-SG
ISBN: 02345 2013 CP
Author: Yoon-Seok Choi
Publication Date: 2013
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In the present study the corrosion properties of carbon steel were evaluated in 50 wt.% MDEA solutions related to the CO2 capture process in fossil fuel-fired power plants. Tests were conducted under an absorber (50oC) condition with different combinations of CO2 O2 and heat stable salts (HSSs: bicine formate sulfate). Corrosion behavior of carbon steel was monitored using electrochemical methods (linear polarization resistance (LPR) and cyclic polarization). Under the absorber conditions the addition of CO2 in the MDEA systems significantly increased the corrosion rate and changed the corrosion behavior from a passive to an active state. In addition the presence of O2 and HSSs in the MDEA/CO2 systems promoted the corrosion process by accelerating both the anodic and cathodic reactions for the corrosion of carbon steel.

In the present study the corrosion properties of carbon steel were evaluated in 50 wt.% MDEA solutions related to the CO2 capture process in fossil fuel-fired power plants. Tests were conducted under an absorber (50oC) condition with different combinations of CO2 O2 and heat stable salts (HSSs: bicine formate sulfate). Corrosion behavior of carbon steel was monitored using electrochemical methods (linear polarization resistance (LPR) and cyclic polarization). Under the absorber conditions the addition of CO2 in the MDEA systems significantly increased the corrosion rate and changed the corrosion behavior from a passive to an active state. In addition the presence of O2 and HSSs in the MDEA/CO2 systems promoted the corrosion process by accelerating both the anodic and cathodic reactions for the corrosion of carbon steel.

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