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- Title
Characterization of 13Cr steel corrosion in simulated EOR-CCUS environment with flue gas impurities.
- Authors
Xiang, Yong; Song, Chicheng; Li, Chen; Yao, Erdong; Yan, Wei
- Abstract
• Pitting corrosion in CO 2 phase was a greater threat than that in water phase. • Formation mechanism of corrosion scale was different in CO 2 and water phases. • Flow was assumed to prevent the accumulation of ions and propagating of pits. • Secondary localized corrosion occurred at the boundary of pits. For a better understanding of the pitting corrosion mechanism of 13Cr steel in a supercritical (SC) CO 2 –H 2 O environment with flue gas impurities, experiments were conducted with different exposure time with and without rotation and Cl–. The results show that the corrosion products formed in CO 2 phase and water phase varied in morphologies and compositions. The corrosion scale in CO 2 phase mainly consisted of amorphous FeCO 3 while the corrosion scale in water phase was mainly made up of crystalline FeCO 3. Pitting corrosion was the predominant corrosion type in supercritical CO 2 with flue gas impurities and it was more severe in CO 2 phase than that in water phase. No pitting corrosion occurred in both CO 2 and water phase with the presence of flow. Cl– enhanced uniform corrosion in both phases and had ability to break down corrosion products. Secondary localized corrosion could be observed at the boundary of pit holes.
- Subjects
FLUE gases; STEEL corrosion; PITTING corrosion; POLYWATER
- Publication
Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B, 2020, Vol 140, p124
- ISSN
0957-5820
- Publication type
Article
- DOI
10.1016/j.psep.2020.04.051