地铁干扰下管道极化电位测试方法及应用

doi:10.11885/j.issn.1674-5086.2021.01.04.01

摘要/Abstract

摘要： 地铁干扰下管道阴极保护电位呈现频繁波动的特点，无法通过传统的断电法获得管道的真实保护电位。从需要断开所有外部电源的角度出发，提出采用试片断电法进行干扰下管道极化电位的测试，并通过现场试验研究，确定了影响管道极化电位准确测试的主要因素及其影响规律，建立了地铁干扰下管道极化电位有效测试的参数设置方法：试片极化达到稳定的时间不少于2.25 h；试片的埋设深度不低于0.30 m；试片与参比的水平间距宜为0.05~0.10 m。

关键词: 管道, 地铁杂散电流, 极化电位, 极化时间, 参比间距

Abstract: The cathodic protection potential of the pipeline fluctuates frequently under the interference of subway. It is impossible to obtain the real protection potential of the pipeline through the traditional cut-off method. Considering that all external currents need to be disconnected, a new method is proposed to measure the polarization potential of the pipeline under the interference. Through field test and research, the main factors affecting the accurate measurement of pipeline polarization potential and their influencing rules are determined, and the parameter setting method of effective measurement of pipeline polarization potential under subway interference is established:the time when the polarization of the test piece reaches stability is at least 2.25 h, the embedding depth of coupon should not be less than 0.30 m. The recommended horizontal distance between the reference electrode and the coupon should be between 0.05 and 0.10 m.

Key words: oil & gas pipeline, dynamic DC stray current, polarization potential, polarization time, reference interval

中图分类号:

TE88

安建川, 张文艳, 余忠仁. 地铁干扰下管道极化电位测试方法及应用[J]. 西南石油大学学报(自然科学版), 2022, 44(4): 174-182.

AN Jianchuan, ZHANG Wenyan, YU Zhongren. Measurement Method and Application of Pipeline Polarization Potential Under Subway Disturbance[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(4): 174-182.

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http://journal15.magtechjournal.com/Jwk_xnzk/CN/Y2022/V44/I4/174

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