Copper coated steel round wire is a new type of grounding body produced by our company using electroplating, continuous casting and other processes. It is made by covering 99.9% pure copper on the surface of a specially made steel core with high-quality technology. Its conductivity is the same as that of copper rods of the same diameter, but the cost is much lower than pure copper. Its anti-corrosion performance is far superior to galvanized steel, and it has many advantages such as good conductivity, low resistance, superior anti-corrosion performance, convenient transportation, convenient construction, and high construction efficiency. It is a choice to replace traditional grounding materials such as round steel, angle steel, and galvanized flat steel.
1、 Product Features
1. The principle of skin effect, its conductivity is equivalent to that of pure copper wire, and good conductivity facilitates the transmission and diffusion of ultra-high currents (such as lightning currents, short-circuit currents in accidents, etc.).
2. Packaged in bundles and shafts, easy to transport, and convenient for loading and unloading;
3. By adopting special heat treatment, it can be made into a soft, long, and significantly reduced straight connection points, reducing the resistance of the grounding grid itself and effectively reducing the hidden danger of grounding grid degradation;
4. Excellent anti-corrosion performance, with a lifespan of up to 50 years;
5. Different processes such as electroplating and continuous casting can be used to manufacture electroplated copper-clad steel grounding round wires and continuous casting copper-clad steel grounding round wires according to user needs.
2、 Product process
The manufacturing process of copper coated steel round wire adopts electroplating technology, which has excellent electrical properties and surface copper material conductivity, making its own resistance value much lower than conventional materials. Excellent and unique anti-corrosion properties, due to the high-temperature fusion welding used at the copper steel bonding interface, there will be no residue or corrosion on the bonding surface; The surface copper layer is relatively thick (average thickness greater than or equal to 0.254mm), with strong corrosion resistance and a service life of more than 50 years, which can greatly reduce the labor intensity of maintenance. This product is suitable for grounding and lightning protection under different soil moisture, temperature, pH value, and resistivity changes. Commonly used as lightning protection belts for roof parapets, vertical grounding leads, down leads, horizontal grounding electrode connections, etc.
3、 Technical parameters
Surface quality
The copper layer is smooth and flat, without obvious defects or other harmful irregular edges.
Coating thickness
The coating thickness of copper plated round steel and copper plated grounding rod is ≥ 0.254mm.
Size requirements
Circular rod-shaped material with a nominal diameter deviation of ≤± 0.10mm.
Tensile strength
The tensile strength of copper-clad steel is ≥ 300MPa, and the length between the fracture location and the fixture is greater than 25.4mm.
Bending performance
After the bending test, the copper layer of the sample does not show cracks, fissures, pits, or other defects that hinder the corrosion performance of the material.
Combining performance
After the copper layer adhesion test, there is no separation between the copper layer and the steel on the sample, and it is allowed for the surface copper to be peeled off by the test instrument.
Electrical resistivity and conductivity
The resistivity is ≤ 8.62 × 10-8 Ω· m, and the conductivity is ≥ 20%.
Thermal stability coefficient
The thermal stability coefficient C of copper plated round steel and copper plated grounding rod shall not be less than 119, and shall be supported by relevant test reports.
Electrical Corrosion Performance
After type testing (current temperature cycling test, freezing melting test, neutral salt spray test, fault current impulse test), the final resistance increase value of the sample shall not exceed 50%, and the resistance increase of each test link in the intermediate process shall not exceed 15%. After the test, the surface of the copper plated steel sample shall be free of cracks, fissures, pits, bubbles, and other defects that may affect the corrosion performance of the material.
Other
The product testing report includes the following items: surface quality, coating thickness, tensile strength, bending performance, bonding performance, electrical resistivity and conductivity, current temperature cycling test, freezing melting test, neutral salt spray test, fault current impact test, etc.
4、 Product Usage
A horizontal grounding body suitable for high requirements such as working grounding, protective grounding, lightning protection grounding, and anti-static grounding in general environments and special environments where chemical corrosive media are generated in humid, saline alkali, and acidic soils. Copper coated steel has superior mechanical and anti-corrosion properties. It is recommended to use copper coated steel grounding round wires (such as horizontal grounding electrodes in extremely acidic environments) for those with severe corrosion and low mechanical stress requirements. Please use different types of grounding round wires according to the specific situation.
To ensure product quality, the product has passed the testing of the Electric Power Research Institute and a corresponding testing report has been issued.
