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Effect of Cr- and Si-addition on Oxidation Behavior of N80 Carbon Steel for Gas Injection Wells in Fire-flooding Oil Field |
FAN Chunhua1, WU Qianlin1( ), XUE Shan2, GE Jialu1 |
1 College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China 2 Zhejiang Wanfeng Light Alloy Research Institute Co., Ltd., Shaoxing 312500, China |
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Cite this article:
FAN Chunhua, WU Qianlin, XUE Shan, GE Jialu. Effect of Cr- and Si-addition on Oxidation Behavior of N80 Carbon Steel for Gas Injection Wells in Fire-flooding Oil Field. Journal of Chinese Society for Corrosion and protection, 2025, 45(1): 231-236.
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Abstract The effect of Cr- and Si-addition on the oxidation behavior of N80 carbon steel for gas injection well tubing was investigated at 450-650 oC in a laboratory made oxidation atmosphere, with the aim to simulate the combustion flame products during the oil field fire-flooding process is adopted for oil production. The results showed that the addition of 3%Cr and 5%Cr (mass fraction) respectively may facilitate the steel to form a thick oxide scale composed of Fe2O3 and (Fe, Cr)3O4, and the oxide scale underwent serious flaking, while the simultaneous addition of 0.5%Si and 5%Cr can not only improve the oxidation resistance of the steel but also significantly inhibit the flaking of the oxide scale, and the addition of 9%Cr may favor the formation of a protective Cr2O3 scale. Furthermore, CrS was found in the inner oxide scale of the N80 steel with the simultaneous addition of 0.5%Si and 5%Cr, while no obvious CrS was found with the addition of 9%Cr. Therefore, the addition of alloying elements Cr and Si can significantly improve the oxidation resistance of N80 carbon steel tubing for gas injection wells.
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Received: 06 August 2024
32134.14.1005.4537.2024.243
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Corresponding Authors:
WU Qianlin, E-mail: wql_1978@163.com
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