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Which material is better for copper plating or galvanizing?

15-10-2020

Which material is better for copper plating or galvanizing?

The ground rod is usually selected according to corrosion resistance and cost. In most cases, people usually only pay attention to the material cost of the ground rod in front of them, but the actual cost is often determined by the service life of the ground rod. The actual cost of the ground rod that is corrosion-resistant and has a long service life is often lower.
Galvanized steel rods are relatively cheap in terms of the material itself. However, it is not a grounding material with high cost-effectiveness, because it is easily corroded and has a short life. Pure copper rods have a long service life, but they are expensive. In addition, pure copper rods are easy to bend because of their soft material, so they cannot be drilled deeply, or even penetrated into harder soil, and are rarely used.


As a compromise, the copper-clad steel grounding rod, the copper skin is attached to the steel core through high voltage, is much cheaper than the copper rod, and it can also be buried deeply. However, the copper skin of the copper-clad steel grounding rod is easy to fall off or crack. Once the copper skin is damaged, the corrosion of the grounding rod will be more serious.
The copper-plated steel ground rod has a layer of nickel on the steel core, and an electrolytic copper layer on the nickel layer. This process ensures the continuous molecular bond between the copper layer and the steel core. Therefore, the copper-plated steel ground rod is recommended because the copper layer will not fall off or crack during deep drilling, and will not crack even when the rod is bent. The copper-plated steel ground rod has good corrosion resistance and can effectively reduce the ground resistance.
However, copper-plated steel ground rods are not always suitable for all situations. The important reminder is that certain soils and regional soils may not be suitable for copper. In this case, its application to stainless steel is a relatively good suggestion. Stainless steel is also an option. In certain structures or components, such as iron towers, poles or wire shielded cables, they are very close to the ground electrode. In this case, the consequences of galvanizing corrosion must be considered. This expensive stainless steel ground rod is forbidden to be used in a wide range.