埋地钢质管道交流干扰测试与评价  

Testing and Assement of AC Interference on Buried Steel Pipelines

作　　者：王新华[1] 陈振华[1] 何仁洋[2] 

机构地区：[1]北京工业大学机械工程与应用电子学院,北京100124 [2]中国特种设备检测研究院压力管道部,北京100013

出　　处：《腐蚀与防护》2011年第1期66-70,共5页Corrosion & Protection

基　　金：北京市朝阳区科技计划项目(K-09-D02)

摘　　要：高压交流输电线路及交流电气化铁路对与其临近铺设的埋地钢质管道会引起交流干扰,产生交流腐蚀,并对阴极保护系统的安全运行带来不利影响。因此,埋地钢质管道中交流干扰的检测与评估是必要的。国内外对于埋地金属管道受交流干扰的测试与分析,主要围绕交流干扰电压、交流电流密度、腐蚀速率等参数的测试来开展。在交流干扰及阴极保护有效性评价方面,国外以交流电流密度及交/直流电流密度比为主要参量。本工作通过对交流干扰下的管地电位信号时频特征研究,得出管地电位信号时频特征与交流干扰源频率存在一致性,为检测和判定埋地钢质管道上的交流干扰提供了一定的依据。AC interference on buried steel pipelines can cause AC corrosion and destroy cathodic protection （CP） system when pipelines are layed down near a high voltage AC power transmission line or electric railway. So, it is necessary to the test and assess the AC interference from the high voltage AC power transmission lines or electric railway. The test and assessment parameters of AC interference at home and abroad are mainly concerned with the AC voltage, AC current density, corrosion rate, AC/DC density ratio and so on. By studying time-frequency domain characteristics of pipe-to-soil potential signal of buried steel pipelines, there is consistency between the time frequency of pipe-to-soil potential signal and frequency of AC interference source, thus provides a basis {or test and judgment of AC interference on buried steel pipelines.

关 键 词：交流干扰 埋地钢质管道 管地电位 电流密度 频谱分析 

分 类 号：TG172.84[金属学及工艺—金属表面处理]