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Effect Of Cr On Corrosion Performance Of Steels In Supercritical CO2 Environments

Effect of Cr on Corrosion Performance of Steels in Supercritical CO2 Environments
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In recent years, several novel technologies have been proposed and developed to produce energy in a clean and sustainable way. However, in the foreseen future, fossil fuel will still be the major source to meet our needs on energy.1 The combustion of fossil fuel for power and heat is always accompanied by CO2 emission, which is believed to be in large correlation to global warming.2 To control the CO2 emission and reduce the negative effects, carbon capture and storage (CCS) has been rapidly developed in fossil fuel combustion power plants.3, 4 One of the crucial parts of CCS is the longdistance transportation of CO2, during which a large amount of captured CO2 is transported to storage sites. Pipeline network is chosen as transportation system due to its high efficiency and moderate cost.5 And the transported CO2 streams are usually compressed into supercritical CO2 (s-CO2).6 

Product Number: 51322-18049-SG
Author: Kaiyang Li, Xue Han, Yimin Zeng
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings
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$20.00
$20.00

As a promising technology, carbon capture and storage (CCS) can significantly reduce CO2 emissions while retaining the core value of fossil fuel power plants. CO2 transportation is a crucial step to ensure the successful deployment of CCS, which is achieved by pipeline network. However, the impurities in the captured supercritical CO2 (s-CO2) may cause severe corrosion damages to pipeline steels. As a control strategy, Cr-bearing steels are proposed as potential candidate materials to mitigate corrosion, especially at the crucial parts of the transportation system. In this paper, corrosion behaviors of steels with different Cr contents were studied in s-CO2 streams with impurities (H2O, SO2, O2, etc.) at 10 MPa and 45 oC. The corrosion rates were measured by mass loss method and the corrosion products were characterized. The effect of Cr on corrosion behavor of steels was also discussed.

As a promising technology, carbon capture and storage (CCS) can significantly reduce CO2 emissions while retaining the core value of fossil fuel power plants. CO2 transportation is a crucial step to ensure the successful deployment of CCS, which is achieved by pipeline network. However, the impurities in the captured supercritical CO2 (s-CO2) may cause severe corrosion damages to pipeline steels. As a control strategy, Cr-bearing steels are proposed as potential candidate materials to mitigate corrosion, especially at the crucial parts of the transportation system. In this paper, corrosion behaviors of steels with different Cr contents were studied in s-CO2 streams with impurities (H2O, SO2, O2, etc.) at 10 MPa and 45 oC. The corrosion rates were measured by mass loss method and the corrosion products were characterized. The effect of Cr on corrosion behavor of steels was also discussed.

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Author: Shiladitya Paul
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Carbon steels such as API 5L X65 are widely used oil and gas exploration, production and transportation service. However, these steels tend to corrode in the presence of wet CO2 and corrosion is more pronounced in the presence of dissolved salts and acids. Other metals, alloys and polymers also degrade in the presence of high pressure gaseous and supercritical CO2. The corrosion rate of carbon steels in some aqueous environments have been reported to be more than a few millimeters per year.9-10 The situation could be further exacerbated by H2S where cracking can be an issue for high strength steels.
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51312-01259-Materials Issues in CO2 Capture Transport and Storage Infrastructure

Product Number: 51312-01259-SG
ISBN: 01259 2012 CP
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51314-3838-Water Impact on Corrosion Resistance of Pipeline Steels in Circulating Supercritical CO2 with SO2- and NO2-Impurities

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