地铁供电迷流腐蚀机理及防护

Mechanism and Protection of Stray Current Corrosion in Metro Power Supply

地铁供电系统产生的迷流对埋地燃气管道、给排水管道、金属管线等造成电化学腐蚀,加速了管道锈蚀。分析了迷流腐蚀产生的机理,提出了交流供电减少迷流腐蚀的措施,并对交流供电地铁列车电压等级进行了研究。

The stray current generated by metro power supply system causes electrochemical corrosion to buried gas pipelines, water supply and drainage pipelines, metal pipelines and so on, which accelerates pipeline corrosion. In this paper, the mechanism of stray current corrosion is analyzed, the measures of reducing stray current corrosion by AC power supply are put forward, and the voltage grade of AC power supply metro train is studied.