Corrosion Behavior of Copper-Clad Steel Bars with Unclad Two-End Faces for Grounding Grids in the Red Clay Soil

Shao, Yupei; Mu, Miaomiao; Zhang, Bing; Nie, Kunlun; Liao, Qiangqiang

doi:10.1007/s11665-017-2581-2

Cited by 17 publications

(16 citation statements)

References 14 publications

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“…Therefore, it can be used to evaluate the state of the grounding grid and predict its service life span. The electrochemical method has been widely used in the study of corrosion resistance of grounding conductor materials [3,36,37]; by contrast, the corrosion state detection in grounding grid is seldom used. Han et al [38] proposed a constant current step method to detect the corrosion of the grounding grid and obtained the polarization resistance value by analyzing the charging curve to reflect the corrosion of the grounding grid at the test location.…”

Section: Electrochemical Methodsmentioning

confidence: 99%

“…The research of corrosion detection is extensive. Corrosion detection technology of a substation grounding grid mainly includes the network method , electromagnetic field method [27][28][29][30][31][32][33][34][35], and electrochemical method [3,[36][37][38][39][40]. In recent years, emerging technologies, such as ultrasonic testing [41,42], electromagnetic pulse time difference location [43] and electromagnetic imaging [44][45][46][47][48][49], have been considered for corrosion detection.…”

Section: Introductionmentioning

confidence: 99%

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Advances and Challenges of Corrosion and Topology Detection of Grounding Grid

Wang

et al. 2019

Applied Sciences

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The grounding device plays performs the role of releasing a lightning current and a fault current in the power system, and the corrosion of the conductor will cause damage to the grounding body, which threatens the safe operation of the power system. The grounding grid corrosion detection technology and equipment guarantee the safe operation of the power system. This paper discusses the research status of grounding corrosion and topological detection in detail and introduces the basic principles, research difficulties and existing problems of the methods such as the electric network method, electromagnetic field method, electrochemical method, ultrasonic detection method and electromagnetic imaging method. The methods of electromagnetic imaging and time difference positioning proposed in recent years have been also discussed in detail. The paper points out that the application of grounding grid corrosion detection distance engineering still faces great challenges and that multi-disciplinary, multi-information fusion, new sensing technology, big data platforms and intelligent computing will be the trends to follow in research on grounding grid fault, corrosion detection and life prediction.

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Section: Electrochemical Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Advances and Challenges of Corrosion and Topology Detection of Grounding Grid

Wang

et al. 2019

Applied Sciences

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“…The corrosion products of copper have the characteristics of high resistivity and strong adsorption, which can effectively protect the internal substrate from further corrosion. According to corrosion tests, the corrosion rate of copper in the soil is about 1/10 to 1/30 that of carbon steel and roughly 1/3 that of galvanized steel, and the corrosion rate of copper is decreasing year by year [ 19 , 20 , 21 ]. The melting point of copper is 1083 °C.…”

Section: The Formation Mechanism and Influencing Factors Of Soil Corrosionmentioning

confidence: 99%

“…In addition to the three commonly used ground conductor materials, many new conductor materials are now put in use. Copper-plated steel, copper-clad steel, and hot-dip tin-plated copper steel are used as alternative materials to copper, which have the advantages of low cost, good electrical conductivity, nicer corrosion resistance, and mechanical strength [ 19 , 25 ]. However, due to the limited thickness of the copper protective layer, once the protective layer is damaged, the exposed copper and the steel substrate form a galvanic corrosion cell, which then accelerates the corrosion of the steel substrate [ 19 , 41 ].…”

Section: The Formation Mechanism and Influencing Factors Of Soil Corrosionmentioning

confidence: 99%

Research Advances of Soil Corrosion of Grounding Grids

Zhang

Liao²,

Xue

et al. 2021

Micromachines

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A grounding grid plays the role of discharging current and balancing voltage to ensure the safety of the power system. However, soil corrosion can damage the grounding grid, which then can endanger the safe operation of power system. This paper reviewed recent research advances of soil corrosion of grounding grid. The cause, mechanism, types, and influencing factors of soil corrosion of grounding grids were summarized, and the corresponding detection technology and protective measures were also introduced. The paper pointed out that soil corrosion is a serious threat to the grounding grid system. Moreover, the impact mechanism of AC stray current, new corrosion detection technology, and better protective measures still need in-depth research.

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“…Currently, the materials used for grounding grid in substation equipment are mainly from galvanized steel, copper-drawn steel, steel, etc. It was found that the iron-aluminum oxides in red soil can promote the corrosion of copper-clad steel [1]. With regard to the effect of chloride ions on corrosion of the materials used for grounding grid, it was found that the corrosion rate of zinc-clad steel increased with increasing chloride ions up to critical chloride concentration.…”

Section: Introductionmentioning

confidence: 99%

Galvanic Corrosion Behavior of Copper–Drawn Steel for Grounding Grids in the Acidic Red Soil Simulated Solution

Fan

Chen

Lin

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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The influence of pH and metallographic structure on the corrosion behavior of copper-drawn steel is studied with the simulated system. The effect of pH on the corrosion behavior of copper-drawn steel has been investigated using open-circuit potential, potentiodynamic polarization, galvanic current measurement, scanning electron microscopy and scanning vibrating electrode technique techniques. The steel is corroded as anode, while the corrosion of copper plate is protected as cathode. All the results revealed that pH and metallographic structure had a significant influence on the corrosion behavior of copper-drawn steel. With the decrease in pH value from 6 to 2.4, the corrosion rate of copper-drawn steel galvanic couple (Cu-Fe GC) obviously increased in the simulated solution of acidic red soil. The electric field formed by the Cu-Fe GC changes the direction of ion migration between the copper and drawn steel electrodes, which impacts the composition and microstructure of corrosion products formed on the electrode surface.

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Corrosion Behavior of Copper-Clad Steel Bars with Unclad Two-End Faces for Grounding Grids in the Red Clay Soil

Cited by 17 publications

References 14 publications

Advances and Challenges of Corrosion and Topology Detection of Grounding Grid

Advances and Challenges of Corrosion and Topology Detection of Grounding Grid

Research Advances of Soil Corrosion of Grounding Grids

Galvanic Corrosion Behavior of Copper–Drawn Steel for Grounding Grids in the Acidic Red Soil Simulated Solution

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