The electrochemical corrosion behavior and the development mechanism of the local corrosion of X65 steel under different defect depths were studied by using macroscopic electrochemical measurements and characterization techniques. A CO₂-saturated NACE solution was used to study electrochemical corrosion characteristics in the single-phase flow-accelerated corrosion test loop system. Changes in the flow characteristic around the defects at different depths were characterized by COMSOL. The results indicated that samples with lower depth defects tends to deepen towards the radial direction both in the deep defects and shallow defects. Moreover, the upper and trailing edge of the defect has a tendency to deepen and expand the region of the defect under the influence of higher turbulent kinetic energy (TKE) and the shearing rate.

利用宏观电化学测量和表征技术研究了X65钢在不同缺陷深度下的电化学腐蚀行为和局部腐蚀的发展机理。一氧化碳₂NACE饱和溶液用于研究单相流动加速腐蚀测试回路系统中的电化学腐蚀特性。用COMSOL表征了在不同深度缺陷周围的流动特性的变化。结果表明，具有较低深度缺陷的样品在深缺陷和浅缺陷中都趋向于向径向方向加深。而且，在较高的湍动能（TKE）和剪切速率的影响下，缺陷的上缘和后缘具有加深和扩展缺陷区域的趋势。