Qingdao Changdi Metal Surface Treatment Co., Ltd.
Qingdao Changdi Electric Power Equipment Co., Ltd
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Copper bonded earth rods probably offer to the installer the best and most economical earth rods available.
They are made by molecularly bonding 99.9% pure electrolytic copper on to a low carbon steel core.
Copper bonded earth rods are not of the sheathed type. They are highly resistant to corrosion, and because the steel used has a very high tensile strength, they can be driven by power hammers to great depths.
The counter bores couplings are made from high copper content alloy, commercial brass is not used.
This again ensures excellent corrosion resistance and high strength. Copper thickness minimum 250 microns.