Corrosion Behavior of Five Type of Power Grid Materials in Natural Coastal Environments

doi:10.11902/1005.4537.2024.272

Journal of Chinese Society for Corrosion and protection

2025, Vol. 45

Issue (4): 1107-1116 DOI: 10.11902/1005.4537.2024.272

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Corrosion Behavior of Five Type of Power Grid Materials in Natural Coastal Environments

LIU Sen¹, HU Jiayuan¹, WEN Xiaohan¹, ZHU Renzheng², LI Yanwei¹, YANG Xiaojia²(

)

1 Electric Power Research Institute of State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310014, China
2 Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China

Cite this article:

LIU Sen, HU Jiayuan, WEN Xiaohan, ZHU Renzheng, LI Yanwei, YANG Xiaojia. Corrosion Behavior of Five Type of Power Grid Materials in Natural Coastal Environments. Journal of Chinese Society for Corrosion and protection, 2025, 45(4): 1107-1116.

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Abstract

The corrosion behavior of five commonly used power grid materials: carbon steel, zinc, galvanized steel, aluminum, and copper in natural environment of a typical coastal area at Zhejiang province was assessed via year-long exposure testing. Meanwhile, electrochemical performance, the surface and cross-sectional morphology and phase composition of the corrosion products were systematically analyzed. Additionally, by integrating four months of online corrosion current monitoring data, the corrosion rates and mechanisms of different materials were explored. The results indicate that the coastal environment significantly affects the corrosion of different materials, with noticeable differences in morphology and thickness of the rust scale. Copper and aluminum exhibited better corrosion resistance, while carbon steel and galvanized steel had higher corrosion rates, and zinc showed strong corrosion resistance in the initial stage.

Key words: power grid materials marine environment rust layer corrosion big data

Received: 28 August 2024 32134.14.1005.4537.2024.272

ZTFLH:

TG172

Fund: State Grid Anhui Electric Power Corporation Limited Technological Project(B311DS230002)

Corresponding Authors: YANG Xiaojia, E-mail: yangxiaojia@ustb.edu.cn

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	LIU Sen
	HU Jiayuan
	WEN Xiaohan
	ZHU Renzheng
	LI Yanwei
	YANG Xiaojia

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https://www.jcscp.org/EN/10.11902/1005.4537.2024.272 OR https://www.jcscp.org/EN/Y2025/V45/I4/1107

Fig.1 Hanging specimens for atmospheric exposure test in a coastal area of Zhejiang

Fig.2 Appearance photos of carbon steel, galvanized steel (ZF), Zn, Cu, and Al sensors (a) and partial enlarged view of the galvanic sensor (b)

Fig.3 Corrosion clock diagram and cumulative power statistics curve for carbon steel (a), Zn (b), ZF (c), Al (d), Cu (e) galvanic probe

Fig.4 Big data monitoring charts of coastal substation environment

Fig.5 Surface morphologies of carbon steel (a), Zn (b), ZF (c), Al (d) and Cu (e) after 1 a atmospheric exposure

Fig.6 Cross-sectional morphologies of the rust layers formed on carbon steel (a), Zn (b), ZF (c), Al (d) and Cu (e) after 1 a atmospheric exposure

Fig.7 XRD patterns of carbon steel (a), Zn (b), ZF (c), Al (d) and Cu (e) after 1 a atmospheric exposure

Fig.8 Nyquist (a), Bode (b) and phase angle (c) plots of five test metals with 1 a atmospheric exposure in distilled water

Fig.9 Pearson correlation diagram

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