摘要
随着武汉轨道交通的迅猛发展,轨道交通泄漏到大地的杂散电流日益增多,但目前缺乏对武汉轨道交通,特别是有轨电车动态杂散电流干扰下腐蚀速率的系统研究。对武汉轨道交通动态直流干扰下的管地电位进行了24 h连续监测,对其干扰进行风险评估并得到了6处腐蚀风险较高点进行腐蚀速率测试。结果显示:土壤自然腐蚀速率为0.022~0.063 mm/a,杂散电流干扰造成的腐蚀速率为0~0.38 mm/a,阴极保护效果良好的情况下管道腐蚀风险较低,存在杂散电流干扰的情况下燃气管道的腐蚀速率是土壤自然腐蚀下的几倍乃至十几倍,干扰最高的有轨电车测试点测得的腐蚀速率最高为0.38 mm/a。
With the rapid development of rail transit in Wuhan,the stray current of rail transit leaking to the earth is increasing. However,there is no systematic study on the corrosion rate under the interference of Wuhan rail transits,especially the dynamic stray current of trams. In this paper,the pipe to ground potential of Wuhan Rail Transit under dynamic DC interference was monitored continuously for 24 h. The risk assessment of the interference was carried out and 6 high corrosion risk points were obtained,where the corrosion rate was tested. Results showed that the natural corrosion rate of the soil was 0.022 ~ 0.063 mm/a,the corrosion rate caused by the interference was 0 ~ 0.38 mm/a. Under the good cathodic protection,the corrosion risk of the gas pipes was low. The corrosion rate of gas pipelines under the interference of stray current was several or even a dozen times more than that under natural soil corrosion. At the tram measure point with the highest level of interference,the highest test rate was 0.38 mm/a.
作者
李勃聪
姜子涛
杨军华
王宏新
李培
陈程
LI Bo-cong;JIANG Zi-tao;YANG Jun-hua;WANG Hong-xing;LuI Pei;CHEN Cheng(Wuhan Natural Gas Co,Ld.,Wuhan 430030,China;China University of Petroleum(Beijing),Beijing 102249,China;Safetech Research Instiute Co.,Lld,Beijing 100083,China)
出处
《材料保护》
CAS
CSCD
2021年第1期178-183,共6页
Materials Protection
作者简介
通信作者:陈程(1990-),硕士,工程师,研究方向为交直流干扰,电话:010-82885770,E-mail:chench@ankosri.com。
