ABSTRACT

To accurately assess the corrosion risk under dynamic AC interference, the dynamic fluctuation characteristics of the pipeline near high-speed railway were analyzed by field test data. The corrosion rate and morphology of corrosion products under natural corrosion, steady AC interference, and dynamic AC interference were compared, and the effect of AC current density and typical dynamic interference cycle on the corrosion rate of X65 steel were investigated. The results show that the corrosion rates under steady and dynamic AC interference are higher than that under natural corrosion. With the increase of peak AC current density and interference time of each cycle, the dynamic AC corrosion rate increases. When the interference time increases to 350s in each interference cycle, the dynamic AC corrosion rate is equivalent to the steady AC corrosion rate.

摘要

为了准确评估动态交流干扰下的腐蚀风险，通过现场测试数据分析了高速铁路附近管道的动态波动特性。比较了自然腐蚀，稳定交流干扰和动态交流干扰下腐蚀产物的腐蚀速率和形貌，研究了交流电流密度和典型动态干扰循环对X65钢腐蚀速率的影响。结果表明，稳态和动态交流干扰下的腐蚀速率均高于自然腐蚀下的腐蚀速率。随着峰值交流电流密度的增加和每个周期的干扰时间的增加，动态交流腐蚀速率增加。当每个干扰周期的干扰时间增加到350s时，