利用检查片检测杂散干扰和评价埋地管道阴极保护效果_图文

1、 234Vol.23No.420117CORROSION SCIENCE AND PROTECTION TECHNOLOGYJul.20111,1, 2,3,31.(,102200; 2.,221000;3.,200122:4000km, ,.,IR.:;:TG172.4:A:10026495(201104034904Detection of Electric Interference and Evaluation of ProtectiveDegree of Applied Cathodic Protection for BuriedPipeline by Coupon Technology

2、WENG Yong-ji 1, MING Shi-tao 1, 2, LI Ying-yi 3, HAN Chang-chai 31. China University of Petroleum Beijing, Beijing 102200; 2. Pipeline Storage &Transport Co., Sinopec, Xuzhou 221000; 3. West-East Gas Pipeline Co., PetroChina, Shanghai 200122Abstract:The buried coupon tests along the 4000km East-

3、West Gas Pipeline were described, as well as the in -situ measurements on buried coupons by DIY instrument. According to the measured AC potential of pipeline and the currents of coupons to pipeline, the AC and DC electric interference was analyzed along the whole pipeline, respectively. In addition

4、s, the possibility of evaluation of the protective degree of the applied cathodic protection on the pipeline by true potential (minusIR drop was discussed under generic electric interference.Key words:East-West Gas Pipeline; cathodic protection; coupon; AC and DC electric interfer-ence; protective e

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6、2.3SX-48.5700.8903.4320.09881.9SX-55.7441.5124.7820.15975.8100#2.7210.1592.6140.09461.2101#2.4490.1181.1280.41584.0YW-01.6030.0792.2310.76595.0BA(Boai0.0200.0021.6970.18087.3102#1.3970.0152.4250.04389.5103#0.3540.0080.6520.01089.3YW-10.0010.0010.0080.00494.8YW-20.33890.0030.2700.00198.7104#0.5140.0220.4250.08398.4 C o u p o n ' s c u r r e n t /m AFig.3Distrib