The copper bonding process is integral to the outstanding durability and corrosion resistance of a copper bonded earthing rod. This cutting-edge manufacturing process is the electroplating of a thick coating of 99.9% pure electrolytic copper on a high-strength steel core. The molecular bond that is created between steel and copper means that the copper layer is securely bound fast, no... https://www.pioneerpowers.com/copper-bonded-earth-rod.php