对鞍山某厂输水管道杂散电流腐蚀进行勘察和分析，并设计了直接排流和电化学阴极保护方法．经６年实践证明，联合保护方法排除了直流干扰，防止了土壤电化学腐蚀，防护效果较好． The investigation and analysis of the stray current corrosion in the water pipelines of a factory in Anshan was carried out. The direct discharge and electrochemical cathodic protection methods were also designed. After 6 years of practice proved that the joint protection method to exclude the DC interference, to prevent soil electrochemical corrosion, better protective effect.