Abstract
The corrosion of grounding materials seriously threatens the safe operation of the power system. The corrosion resistance of four typical grounding materials as carbon steel, galvanized steel, Zn–Al-coated steel, copper was studied in acid red soil. The results show that carbon steel, galvanized steel, Zn–Al-coated steel, copper exhibit different corrosion resistance behaviors, respectively. The corrosion rate of these grounding materials usually increases first and then slowly decreases. Pitting corrosion is the main corrosion feature of carbon steel. The corrosion rate of carbon steel is the largest compared to the other three grounding materials. The corrosion rate of galvanized steel is higher than that of copper. Copper has a low corrosion rate and exhibits good corrosion resistance, but the cost of copper is high and it causes heavy metal pollution. The corrosion rate of Zn–Al-coated steel is the lowest compared to the other three grounding materials, and it has the best corrosion resistance.
Highlights
The grounding equipment is of great significance to ensure the safe operation of the power system
Some researchers have carried out research on grounding materials and grounding methods
The corrosion characteristics of carbon steel, galvanized steel, aluminum–zinc steel and copper were studied in the laboratory and in acid red soil
Summary
The grounding equipment is of great significance to ensure the safe operation of the power system. The grounding material works for long periods in the soil environment and grounding equipment is inevitably damaged by corrosion [7,8,9,10,11,12]. Corrosion studies on grounding materials were usually focused on carbon steel [13]. Lin Bilan [17] investigated the corrosion behavior of zinc and Zn15Al coating materials in Dagang soil. Vanessa DE Freitas Cunha Linus et al [18] studied the soil corrosion of X52 API carbon steel by the electrochemical method. The corrosion characteristics of carbon steel, galvanized steel, aluminum–zinc steel and copper were studied in the laboratory and in acid red soil. Where the summer temperature exceeds 30 ◦ C and the humidity exceeds 50, which is a typical acid soil environment
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