根据某油田不同井况条件，配制不同井下模拟溶液，用高温高压釜研究了4种不同成分的13Cr马氏体不锈钢在不同温度、Cl-浓度和CO2分压下的腐蚀行为，对腐蚀性能进行了评价，用SEM，EDS，XRD和XPS等方法对腐蚀产物的形貌与成分进行了观察分析。结果表明，随着温度的升高及Cl-浓度和CO2分压的增大，13Cr系列不锈钢的腐蚀速率均相应增大，腐蚀速率由高到低的排序为13Cr-0>13Cr-1>M13Cr>S13Cr；其腐蚀产物膜的形貌与结构也有明显差异。
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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