高铁动态交流干扰下管道钢的腐蚀行为试验研究

doi:10.11902/1005.4537.2021.212

中国腐蚀与防护学报

2022, Vol. 42

Issue (1): 127-134 DOI: 10.11902/1005.4537.2021.212

研究报告

本期目录 | 过刊浏览

高铁动态交流干扰下管道钢的腐蚀行为试验研究

邓佳丽¹, 闫茂成²(

), 高博文², 张辉²

^1.山东实华天然气有限公司青岛 266071
^2.中国科学院金属研究所国家金属腐蚀控制工程技术研究中心沈阳 110016

Corrosion Behavior of Pipeline Steel Under High-speed Railway Dynamic AC Interference

DENG Jiali¹, YAN Maocheng²(

), GAO Bowen², ZHANG Hui²

^1.Shandong Shihua Natural Gas Co. Ltd. , Qingdao 266071, China
^2.National Engineering Research Center for Corrosion Control, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

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摘要:

利用电化学测试、表面分析及失重分析技术，研究了模拟高铁动态交流干扰下管道钢的腐蚀行为和规律及阴极保护的有效性。结果表明，动态交流干扰下，阴极保护电位向负方向偏移，交流干扰增大管道的阴极保护电流密度；动态交流干扰下，随干扰水平增加，管道钢腐蚀程度增加，点蚀坑明显加深。阴极保护明显减缓交流干扰试样的腐蚀程度，腐蚀速率降为不施加阴极保护试样的一半；本实验条件下，-1.0 V阴极保护电位可充分保护低于水平100 A/m²的动态交流干扰腐蚀。

关键词 ：管道钢, 杂散电流, 交流干扰, 交流腐蚀, 阴极保护

Abstract：

Corrosion behavior of a pipeline steel in an artificial soil in the presence of dynamic AC interference, as a simulation of the interference of high-speed railway, is studied by means of mass-loss method, electrochemical measurements and surface analysis technique. The results show that, in the presence of dynamic AC interference, cathodic protection potential shifts to the negative direction, while the AC interference can increase the cathodic protection current density of the pipeline steel coupon. With the increase of interference intensity, the corrosion degree of pipeline steel increases and the pits deepen obviously. Cathodic protection (CP) can significantly slow down the corrosion degree of pipeline samples induced by the AC interference, and the corrosion rate is reduced to half of that of samples without cathodic protection. In the precent experimental case, the applied potential -1.0 V CP can fully protect the pipeline steel from corrosion induced by the dynamic AC interference with stray current below 100 A/m².

Key words： pipeline steel stray current interference AC interference AC corrosion cathodic protection

收稿日期: 2021-08-24

ZTFLH:

TG174

基金资助:国家自然科学基金(52071320);国家材料环境腐蚀;平台项目(2005DKA10400)

通讯作者: 闫茂成 E-mail: yanmc@imr.ac.cn

Corresponding author: YAN Maocheng E-mail: yanmc@imr.ac.cn

作者简介: 邓佳丽，女，1987年生，工程师

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引用本文:

邓佳丽, 闫茂成, 高博文, 张辉. 高铁动态交流干扰下管道钢的腐蚀行为试验研究[J]. 中国腐蚀与防护学报, 2022, 42(1): 127-134.
Jiali DENG, Maocheng YAN, Bowen GAO, Hui ZHANG. Corrosion Behavior of Pipeline Steel Under High-speed Railway Dynamic AC Interference. Journal of Chinese Society for Corrosion and protection, 2022, 42(1): 127-134.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2021.212 或 https://www.jcscp.org/CN/Y2022/V42/I1/127

图1 动态交流干扰实验装置示意图

图2 不同的交流电流密度干扰实验原理图

表1 动态交流干扰条件下的实验参数设置

图3 试样在不同交流电流密度干扰水平下的极化曲线

图4 动态交流干扰下管道钢试样的阴极保护电位和交流电压的变化

图5 无阴极保护管道钢试样动态交流干扰试验后表面腐蚀产物形貌

图6 试样表面腐蚀产物XRD谱

图7 阴极保护管道钢动态交流干扰X65钢试验后试样宏观形貌

图8 阴极保护管道钢动态交流干扰试验后试样表面腐蚀产物形貌

图9 动态交流干扰试验后管道钢试样表面腐蚀形貌SEM图

图10 动态交流干扰试验后管道钢试样表面腐蚀坑CLSM形貌图

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