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INVESTIGATION ON CARBON DIOXIDE CORROSION PERFORMANCE OF VARIOUS 13Cr STEELS IN SIMULATED STRATUM WATER |
HOU Zan1, ZHOU Qingjun2, WANG Qijiang1,2, ZHANG Zhonghua2, QI Huibin1,2, WANG Jun1 |
1. School of Materials Science & Engineering, Shanghai Jiao Tong University 200240
2. Bao Shan Iron & Steel Co. Ltd, 201900 |
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Abstract The corrosion behaviour of various 13Cr steels (marked as 13Cr-0, 13Cr1, M13Cr and S13Cr) in the CO$_{2}$ corrosion environment was investigated by high temperature and high pressure (HTHP) autoclave under conditions of different temperatures, concentrations of Cl ion and partial pressures of CO2 to simulate the downhole surroundings of a certain oil field. Their corrosion scales were observed and analyzed by scanning electron microscope(SEM), energy dispersive spectrometer(EDS), X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS). The results shown that corrosion rates of all steels increased with rising of temperature, concentration of Cl ion and CO2 partial pressure; temperature had the most notable impact on corrosion rates, at a high temperature, the four 13Cr steels exhibited conspicuous differences in corrosion rates; the order of corrosion rates of the four steels was 13Cr-0>13Cr-1>M13Cr>S13Cr. Furthermore, the morphologies and microstructures of corrosion scales on different steels differed significantly from each other.
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Received: 22 August 2011
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Corresponding Authors:
WANG Jun
E-mail: junwang@situ.edu.cn
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