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10196 Effect of Impurities on the Corrosion Behavior of Carbon Steel in Supercritical CO2 - Water Environments

Picture for 10196 Effect of Impurities on the Corrosion Behavior of Carbon Steel in Supercritical CO2 - Water
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Product Number: 51300-10196-SG
ISBN: 10196 2010 CP
Author: Yoon-Seok Choi, Srdjan Nešic
Publication Date: 2010
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The objective of the present study is to evaluate the corrosion properties of carbon steel in supercritical CO2/H2O/O2/SO2 mixtures related to the transmission of CO2 to sequestration sites. The corrosion property of carbon steel was evaluated by using an autoclave with different impurities at 80 bar CO22 and 50oC. The concentrations of O2 and SO2 were changed from its maximum concentrations in supercritical CO2 phase (4% for O2 and 1% SO2). The corrosion rate of samples was determined by weight loss measurements. The surface morphology and the composition of the corrosion product layers were analyzed by using surface analytical techniques (SEM, EDS, and Raman spectroscopy). In addition, a mitigation strategy for corrosion of CO2 transport pipelines was suggested by utilizing corrosion resistant alloys (CRA).

Key words: Supercritical CO2, CO2 corrosion, O2, SO2, carbon steel, CO2 sequestration
The objective of the present study is to evaluate the corrosion properties of carbon steel in supercritical CO2/H2O/O2/SO2 mixtures related to the transmission of CO2 to sequestration sites. The corrosion property of carbon steel was evaluated by using an autoclave with different impurities at 80 bar CO22 and 50oC. The concentrations of O2 and SO2 were changed from its maximum concentrations in supercritical CO2 phase (4% for O2 and 1% SO2). The corrosion rate of samples was determined by weight loss measurements. The surface morphology and the composition of the corrosion product layers were analyzed by using surface analytical techniques (SEM, EDS, and Raman spectroscopy). In addition, a mitigation strategy for corrosion of CO2 transport pipelines was suggested by utilizing corrosion resistant alloys (CRA).

Key words: Supercritical CO2, CO2 corrosion, O2, SO2, carbon steel, CO2 sequestration
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