大功率直流电系统均有造成杂散电流破坏的可能,如有轨电车、电气火车、地铁、直流输电系统、矿山井下直流系统、直流机械、大型焊机等,有可能造成附近结构物、管道、电缆等的损坏。更值得注意的是化工电解过程及干、湿法冶炼工厂,由于较为普遍地存在着漏电现象,使厂房结构受到杂散电流的破坏,影响耐久性,甚至危及安全、造成灾难性事故,此外,还造成能源损失及停产、维护等经济方面的损失。图1、2是某电解厂房钢筋混凝土承重结构遭受杂散电流破坏情况。该厂房在投产六年之后就不得不进行大修及加固。 High-power DC systems are likely to cause stray current destruction, such as trams, electric trains, subways, DC transmission systems, underground mine DC systems, DC machines, large welders, may cause nearby structures, pipes, Cables and other damage. Even more noteworthy is the chemical electrolysis process and dry and wet smelting plants, due to the more widespread existence of leakage phenomenon, the plant structure by the stray current damage, affect the durability, or even endanger the safety, causing catastrophic accidents, in addition, But also caused losses of energy and economic losses such as production stoppage and maintenance. Fig. 1 and Fig. 2 show that the storied current is damaged by the load-bearing structure of reinforced concrete in an electrolysis plant. The plant had to undergo overhaul and reinforcement six years after commissioning.