基于数值计算的罐底板阴极保护电位分布研究进展与展望

doi:10.11902/1005.4537.2022.270

中国腐蚀与防护学报

2023, Vol. 43

Issue (4): 871-881 CSTR: 32134.14.1005.4537.2022.270 DOI: 10.11902/1005.4537.2022.270

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基于数值计算的罐底板阴极保护电位分布研究进展与展望

寇杰(

), 任哲

中国石油大学 (华东) 储运与建筑工程学院青岛 266580

Research Progress of Regional Cathodic Protection Potential Distribution of Tank Floor Based on Numerical Calculation

KOU Jie(

), REN Zhe

College Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, China

全文: PDF(3252 KB) HTML

摘要:

总结了近几十年的罐底板阴极保护研究，归纳了影响油罐外底板腐蚀的直接和间接因素，介绍了储罐底板阴极保护的机理、方法及所用阳极地床形式，分析了目前数值模拟计算方法在罐底板阴极保护中的应用并讨论了阴极保护数值模拟技术的最新进展，以及阴极保护数值模拟技术现有的缺点，并对其未来的发展趋势进行了预测，可以为阴极保护系统的建设提供参考。

关键词 ：区域性阴极保护, 电位分布, 数值计算, 罐底板

Abstract：

At present, cathodic protection technology is the most effective and economical method for preventing oil and gas storage tank from corrosion, while regional cathodic protection technology, especially the regional cathodic protection technology of tank farms, is not mature enough. How to determine whether the cathodic protection applied to the protected facility is achieved the desire effect is still the bottleneck of the current technological development. This paper primarily summarizes the research on cathodic protection of tank floors from the previous decades and the direct and indirect factors impacting the tank outer floor corrosion, introduces the mechanisms, methods and forms of anode bed used for cathodic protection of tank floors, describes the application of the current numerical simulation calculation methods in cathodic protection of tank floors and the latest advancements. Finally, we summarize the existing drawbacks of numerical simulation techniques for cathodic protection and forecast their future development trends, with the goal of providing a helpful reference for construction of cathodic protection systems.

Key words： regional cathodic protection potential distribution numerical simulation tank floor

收稿日期: 2022-09-02 32134.14.1005.4537.2022.270

ZTFLH:

TE988

基金资助:国家自然科学基金(52004323)

通讯作者: 寇杰，E-mail: chuyunk@126.com，研究方向为油气储运安全工程

Corresponding author: KOU Jie, E-mail: chuyunk@126.com

作者简介: 寇杰，男，1969年生，教授

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引用本文:

寇杰, 任哲. 基于数值计算的罐底板阴极保护电位分布研究进展与展望[J]. 中国腐蚀与防护学报, 2023, 43(4): 871-881.
KOU Jie, REN Zhe. Research Progress of Regional Cathodic Protection Potential Distribution of Tank Floor Based on Numerical Calculation. Journal of Chinese Society for Corrosion and protection, 2023, 43(4): 871-881.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.270 或 https://www.jcscp.org/CN/Y2023/V43/I4/871

图1 罐底板腐蚀机理

图2 储罐底板腐蚀因素

图3 金属表面电位与表面pH关系图[9]

图4 牺牲阳极保护技术与强制电流保护技术原理对比

图5 阳极地床形式图

表1 不同边界条件下的保护电位计算误差[26]

图6 X100钢在不同宽度和深度的缺陷处的电流密度[43]

图7 极化电位和电荷转移电阻之间关系[60]

图8 不同极化电位下金属的阻抗和保护程度[61]

图9 不同罐底介质的电阻率变化对保护电位的影响[67]

图10 不同阳极埋设形式下的罐底保护电位数值[68]

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