![]() ![]() UndergroundĬopper is the preferred metal for grounding conductors and electrodes. What is surprising to some is that soil or air can be an electrolyte. Galvanic corrosion is an electrochemical process whereby one metal corrodes preferentially to another whenever both metals are put in electrical contact and immersed in an electrolyte. But it would be misleading to infer that copper will not corrode. Copper, a noble metal that occurs naturally in its elemental form, is almost totally impervious to corrosion from soils found worldwide. These include high thermal and electrical conductivity, ease of manufacture, high recyclability and good corrosion resistance. Non-tinningĬopper and copper alloys are widely used because they combine unique properties at an economical price.
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