期刊
JOURNAL OF SUPERCRITICAL FLUIDS
卷 116, 期 -, 页码 70-82出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.supflu.2016.05.006
关键词
Supercritical CO2; Impurity; Localized corrosion; Corrosion scale; X65 steel
资金
- National Natural Science Foundation of China [51471188]
- Natural Science Foundation of Shandong Province [ZR2014EIVIM002]
- Fundamental Research Funds for the Central Universities [15CX06057A]
A range of impurities from various CO2 capture processes may exist in supercritical CO2 transport pipeline in carbon capture and storage process. In this regard, the corrosion behavior of X65 steel in water saturated supercritical CO2 containing O-2, H2S, SO2 or NO2 impurity was investigated using weight loss measurement and surface characterization. The corrosion impact factor was defined which showed that NO2 or SO2 had the greatest influence on the corrosion of X65 steel, followed by H2S and O-2. Localized corrosion occurred in water-saturated supercritical CO2 system containing NO2 with or without other impurities. Low concentrations of impurities could notably change the corrosion rate and the characteristics of corrosion scale via changing the corrosion mechanism, and thus the corrosion effect of CO2 weakened in water -saturated supercritical CO2 system containing impurities. (C) 2016 Elsevier B.V. All rights reserved.
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