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中国腐蚀与防护学报  2026, Vol. 46 Issue (4): 1296-1304     CSTR: 32134.14.1005.4537.2026.046      DOI: 10.11902/1005.4537.2026.046
  研究报告 本期目录 | 过刊浏览 |
海水管道牺牲阳极监测与评估模型研究
章强1,2(), 李德3, 肖调兵1, 熊壮3, 孙文2
1.中核武汉核电运行技术股份有限公司 武汉 430223
2.大连理工大学化工学院 大连 116024
3.三门核电有限公司 台州 317109
Research on Monitoring and Evaluation Model for Sacrificial Anodes in Seawater Pipelines
ZHANG Qiang1,2(), LI De3, XIAO Diaobin1, XIONG Zhuang3, SUN Wen2
1.China Nuclear Power Operation Technology Co. Ltd., Wuhan 430223, China
2.School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
3.Sanmen Nuclear Power Co. Ltd., Taizhou 317109, China
引用本文:

章强, 李德, 肖调兵, 熊壮, 孙文. 海水管道牺牲阳极监测与评估模型研究[J]. 中国腐蚀与防护学报, 2026, 46(4): 1296-1304.
Qiang ZHANG, De LI, Diaobin XIAO, Zhuang XIONG, Wen SUN. Research on Monitoring and Evaluation Model for Sacrificial Anodes in Seawater Pipelines[J]. Journal of Chinese Society for Corrosion and protection, 2026, 46(4): 1296-1304.

全文: PDF(3467 KB)   HTML
摘要: 

牺牲阳极阴极保护是滨海电厂海水管路防腐蚀的有效手段,但海水管路内部牺牲阳极消耗状态及剩余寿命、保护电流大小等信息获取不便。为计算牺牲阳极输出电流和剩余量并评估牺牲阳极剩余寿命,本文针对某段Q235钢海水管路及配套的A21E-2牺牲阳极,基于有限元法,采用极化曲面边界条件设置方法,建立了可响应包括温度、流速在内的腐蚀环境实时变化的牺牲阳极阴极保护全过程数值模拟模型,并利用数据孪生技术优化监测模型。经与实测数据相比较,该模型预测的准确度超过80%。

关键词 滨海电厂数值模拟牺牲阳极极化曲面海水管路    
Abstract

As a protective means sacrificial anode is an effective method of corrosion prevention for seawater pipelines in coastal power plants. However, to monitor its operation parameters, such as the consumption status of sacrificial anodes within seawater pipelines, remaining lifespan, and the intensity of protective current etc. is quite challenging. In this study, a specific section of Q235 steel seawater pipeline equipped with A21E-2 sacrificial anodes was selected to attempt to acquire the relevant output current and remaining capacity of those sacrificial anodes, and to evaluate their remaining service life. For this purpose, a numerical simulation model for the entire process of sacrificial anode cathodic protection is established by using the finite element method and applying appropriate polarization boundary conditions. This model takes into account the real-time changes in the corrosive environment, including temperature and flow velocity, and was optimized using digital twin technology. Compared with the measured data, the prediction accuracy of this model exceeds 80%.

Key wordscoastal power plant    numerical simulation    sacrificial anode    polarization surface    seawater pipeline
收稿日期: 2026-02-06      32134.14.1005.4537.2026.046
ZTFLH:  TG174  
基金资助:中国核能电力股份有限公司研发项目(K220514)
通讯作者: 章强,E-mail:zhangqiang06@cnnp.com,研究方向为金属的腐蚀与防护
Corresponding author: ZHANG Qiang, E-mail: zhangqiang06@cnnp.com
作者简介: 章 强,男,1983年生,硕士,高级工程师
图1  试验装置几何模型
No.Anode dimensions / mm × mm × mmMass/ kgSacrificial anode remaining
A80 × (20 + 28) × 150.07776100%
B80 × (15 + 21) × 120.04665660%
C80 × (9 + 10.2) × 7.50.01555220%
表1  不同剩余量A21E-2牺牲阳极的尺寸及质量
图2  A21E-2阳极在10、20和30 ℃下不同流速(0~1.8 m/s)的极化曲线
图3  Q235钢在10、20和30 ℃下不同流速(0~1.8 m/s)的极化曲线
图4  A21E-2阳极和Q235钢在20 ℃时的极化曲面
Anode remaining rateSeawater flow rate / m·s-1Average measured value / mA
100%037
100%0.246
100%0.666
60%026
60%0.233
60%0.642
20%019
20%0.223
20%0.634
表2  动水试验典型工况的试验数据
图5  经插值法补全全况的阳极理论输出电流数据
图6  不同工况下阳极输出电流的仿真结果;原始数据与拟合数据曲面的三维示意图
图7  100%阳极剩余、流速0.8 m/s时实验装置内流场分布云图
图8  流速0.8 m/s,阳极剩余100%、60%、20%时实验装置内电极电位分布云图及电极电流密度分布云图
图9  不同流速、不同阳极剩余量下的阳极输出电流仿真预测结果
Anode remaining rateSeawater flow rate / m·s-1Measured current, I / mAPredicted Current, I′ / mADeviation rate
100%03731.0416.12%
100%0.24637.3818.73%
100%0.66653.4319.04%
60%02626.96-3.71%
60%0.23334.47-4.44%
60%0.64249.09-16.88%
20%01921.36-12.41%
20%0.22326.29-14.29%
20%0.63439.95-17.50%
表3  牺牲阳极输出电流的预测值与实测值比较
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