燃气管道整体阴极保护评估方法研究

华伟, 刘俐俐, 任勇, 孟培彦, 胡学涛, 钱铖, 台宝灿, 何少平, 杨阳

doi:10.16577/j.issn.1001-1560.2023.0304

材料保护 >

2023 , Vol. 56 >Issue 12: 188 - 193

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0304

实用技术

燃气管道整体阴极保护评估方法研究

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北京市燃气集团有限责任公司

钱铖(1992-),工程师,主要从事方向为城市燃气运营与安全管理,电话:15810499293,E-mail:1170121031@qq.com

收稿日期: 2023-06-28

修回日期: 2023-07-30

录用日期: 2023-08-20

网络出版日期: 2024-01-09

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Integral Cathodic Protection Evaluation Method for Gas Pipelines

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(Beijing Gas Group Co., Ltd., Beijing 100035, China)

Received date: 2023-06-28

Revised date: 2023-07-30

Accepted date: 2023-08-20

Online published: 2024-01-09

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摘要

及时识别燃气管道整体阴极保护状态,对于提高燃气管道等公共基础设施安全至关重要。提出了一种准确便捷的管段整体阴极保护评估方法——保护电流法,可识别燃气管道整体阴极保护状态,在北京地区土壤环境中选择多种不同数量级电阻率防腐层管道开展馈电试验,明确管道达到临界有效阴极保护[管段最正极化电位-0.85 V(vs CSE)]所需保护电流密度,将现场测试与数值模拟相结合,得出阳极管道间距对保护电流需求值的影响规律。

关键词： 城市燃气管道; 牺牲阳极; 防腐层电阻率; 阴极保护电流密度; 数值模拟计算; 影响规律

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华伟, 刘俐俐, 任勇, 孟培彦, 胡学涛, 钱铖, 台宝灿, 何少平, 杨阳 . 燃气管道整体阴极保护评估方法研究[J]. 材料保护, 2023 , 56(12) : 188 -193 . DOI: 10.16577/j.issn.1001-1560.2023.0304

Abstract

Timely identification of the overall cathodic protection status of the gas pipeline is very important for improving the safety of the gas pipeline and other public infrastructure. In this paper, an accurate and convenient method for evaluating the integral cathodic protection of the pipeline section, the protection current method, was proposed. This method could identify the overall cathodic protection status of the gas pipeline. In the soil environment of Beijing, various pipelines with different orders of magnitudes of electrical resistivity anticorrosive coating were selected for the feeding experiments. The protection current density required for the pipeline to reach the critical effective cathodic protection was clarified [the most positive polarization potential of the pipeline section was -0.85 V (vs CSE)]. Combined with field tests and numerical simulations, the influence law of anode pipe spacing on protection current demand value was analyzed and obtained.

Key words： urban gas pipeline; sacrificial anode; resistivity of anticorrosive coating; cathodic protection current density; numerical simulation calculation; influence laws

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