Chapter
Dec 21, 2012
Research on the Structure of Coupons in the Multi-Function Cathodic Protection Test Probe
Authors: Jia Liu [email protected], Liang Gong [email protected], Yanxia Du [email protected], Benge Zhang [email protected], Liuqun Huang [email protected], Yuliang Wu [email protected], Juanli Guo [email protected], and Leibin Zuo [email protected]Author Affiliations
Publication: ICPTT 2012: Better Pipeline Infrastructure for a Better Life
Abstract
For the multi-function cathodic protection test probe, the structure and relative displacement between coupons is always a crucial problem. In this paper, the effect of the polarized coupon on the potential of the corrosion coupon and stray current interference were studied when coupons were set in two different arrangements. The results showed that, the smaller the area of the polarized coupon was relative to the corrosion coupon or the larger the space between coupons was, the stronger the performance of anti-interference of test probe by itself or the stray current was when in parallel arrangement, and it was reasonable that the area of the coupon from pipeline with coating of good quality was 1cm2; when in concentric arrangement, the geometric center of the coupon had the best performance of anti-interference, thus, with regard to pipeline with coating of poor quality but requiring coupons of larger area to simulate the holiday, the polarized coupon and the corrosion coupon could be made as circular ring type and be arranged concentrically and horizontally in the bottom of the probe of which the center was the reference electrode.
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© 2013 American Society of Civil Engineers.
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Published online: Dec 21, 2012
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engineer, Crossing Department, China Petroleum Pipeline Engineering Corporation; No. 146, Peace Road, Langfang 065000. E-mail: [email protected]
engineer, Crossing Department, China Petroleum Pipeline Engineering Corporation; No. 146, Peace Road, Langfang 065000. E-mail: [email protected]
Lecturer, Corrosion and Protection Center, University of Science & Technology Beijing; No. 30, Xueyuan Road, Haidian District, Beijing 100083. E-mail: [email protected]
engineer, Crossing Department, China Petroleum Pipeline Engineering Corporation; No. 146, Peace Road, Langfang 065000. E-mail: [email protected]
Senior Engineer, Crossing Department, China Petroleum Pipeline Engineering Corporation; No. 146, Peace Road, Langfang 065000. E-mail: [email protected]
engineer, Crossing Department, China Petroleum Pipeline Engineering Corporation; No. 146, Peace Road, Langfang 065000. E-mail: [email protected]
engineer, Crossing Department, China Petroleum Pipeline Engineering Corporation; No. 146, Peace Road, Langfang 065000. E-mail: [email protected]
engineer, Crossing Department, China Petroleum Pipeline Engineering Corporation; No. 146, Peace Road, Langfang 065000. E-mail: [email protected]
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