The reasons for invalid cathodic protection by rectifier in gas transmission pipeline in Lanzhou City are analyzed, and the concrete reconstruction treatment measures are put forward.
分析了兰州燃气输气管道外加电源阴极保护失效的原因，提出了具体的改造处理措施。
The reasons for invalid cathodic protection by rectifier in gas transmission pipeline in Lanzhou City are analyzed, and the concrete reconstruction treatment measures are put forward.
分析了兰州燃气输气管道外加电源阴极保护失效的原因，提出了具体的改造处理措施。
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