Abstract
Conductive concrete has great application potential in grounding and electromagnetic shielding. To verify the effect of conductive concrete on the corrosion of grounded metals, several conductive concrete with different conductive phase, such as Q235 carbon steel, galvanized steel and stainless steel, were prepared. The conductive concrete test specimens are immersed in red soil leachate, their open circuit potential, potentio-dynamic polarization and electrochemical impedance spectroscopy were measured by electrochemical method. Corrosion behaviour of different grounding metals in conductive clays with different conductive phase are compared based on the pre-mentioned three indicators. The results show that conductive concrete can reduce the corrosion of grounded mental effectively compared with ordinary concrete, galvanized steel has better corrosion resistance than Q235 carbon steel, graphite-based conductive concrete can protect the grounding metal better than stainless steel-based conductive concrete, and high conductive phase content can make a low metal corrosion.
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