Corrosion Behavior of Copper in a Simulated Grounding Condition in Electric Power Grid

doi:10.11902/1005.4537.2022.098

Journal of Chinese Society for Corrosion and protection

2023, Vol. 43

Issue (2): 435-440 DOI: 10.11902/1005.4537.2022.098

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Corrosion Behavior of Copper in a Simulated Grounding Condition in Electric Power Grid

GAO Yibin¹, DU Xiaogang¹, WANG Qiwei²(

), ZHONG Liming¹, FU Wenhua¹, ZHANG Hanping¹, ZHANG Meng¹, JIANG Chunhai²

^1.State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China
^2.School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China

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Abstract

The corrosion behavior of copper was studied by means of an indoor simulation accelerated test method, aiming to simulate the situation that copper earthed in acidic soil in power grid with alternating current (AC) interference, as well as electrochemical measurement, X-ray diffractometer (XRD) and scanning electron microscope (SEM). The results demonstrate that the interference current AC has a great influence on the corrosion of copper. The corrosion rate of copper is positively related to AC density. The main corrosion products are CuO and Cu₂O, while the proportion of Cu₂O was declined with the increasing AC density.

Key words: grounding condition copper soil corrosion alternating current electric power grid

Received: 08 April 2022 32134.14.1005.4537.2022.098

ZTFLH:

TG172

About author: WANG Qiwei, E-mail: zhangjunxi@21cn.com

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	Yibin GAO
	Xiaogang DU
	Qiwei WANG
	Liming ZHONG
	Wenhua FU
	Hanping ZHANG
	Meng ZHANG
	Chunhai JIANG

Cite this article:

GAO Yibin, DU Xiaogang, WANG Qiwei, ZHONG Liming, FU Wenhua, ZHANG Hanping, ZHANG Meng, JIANG Chunhai. Corrosion Behavior of Copper in a Simulated Grounding Condition in Electric Power Grid. Journal of Chinese Society for Corrosion and protection, 2023, 43(2): 435-440.

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https://www.jcscp.org/EN/10.11902/1005.4537.2022.098 OR https://www.jcscp.org/EN/Y2023/V43/I2/435

Fig.1 Graphic of copper corrosion rate with varied AC densities

Fig.2 XRD patterns of products formed on the copper

Fig.3 Diagram of the value of Cu₂O/CuO for copper in the copper electrodes interfered with different AC intensities in acidic soil by XRD patterns

Fig.4 SEM images of corrosion products formed on the copper with interference of different AC intensities; copper with AC intensities of 0 A/m² (a), 10 A/m² (b), 30 A/m² (c), 50 A/m² (d) and 100 A/m² (d) respectively

Fig.5 Potentiodynamic polarization curves for copper with interference of AC intensities in simulated acidic soil solution

Table 1 Fitted result of potentiodynamic polarization curves

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