The effect of flow velocity on the corrosion behavior of X100 steel in CO₂-saturated produced water (CO₂-SPW) was studied. Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) were used to study the corrosion behavior of X100 steel. X-ray diffraction (XRD), a metallurgical microscope, and a scanning electron microscope (SEM) were used to analyze corrosion product composition and morphology, respectively. The results show that the corrosion current density increases and impedance value decreases with the increase of the flow rate. The corrosion products are mainly FeCO₃ and Fe₃C. The corrosion degree of the bend segment is more serious than that of the straight segment. COMSOL simulation proposed the correlation between X100 corrosion behavior and material concentration and flow field distribution. A corrosion model was proposed, where the corrosion mechanism of X100 under simulated working condition was explained.

研究了流速对X100钢在CO ₂饱和采出水（CO ₂ -SPW）中腐蚀行为的影响。电位动力极化（PDP）和电化学阻抗谱（EIS）用于研究X100钢的腐蚀行为。X射线衍射（XRD），金相显微镜和扫描电子显微镜（SEM）分别用于分析腐蚀产物的组成和形态。结果表明，随着流速的增加，腐蚀电流密度增加，阻抗值减小。腐蚀产物主要是FeCO ₃和Fe ₃C.弯曲段的腐蚀程度比直线段的严重。COMSOL仿真提出了X100腐蚀行为与材料浓度和流场分布之间的相关性。提出了腐蚀模型，解释了X100在模拟工作条件下的腐蚀机理。