Copper plated flat steel is a new type of bimetal composite material. It has both high strength, excellent elasticity, high thermal resistance and high magnetic permeability of the steel, and good electrical conductivity and excellent corrosion resistance of copper. There are three types of copper-plated steel products on the market. One is electroplating, one is copper-clad, and the other is horizontal continuous casting. The cost of horizontal continuous casting is very high. Generally, copper-plated steel products used for grounding are not Use this process. Electroplating process: The high-purity electrolyzed copper is electrolyzed to make it completely adhere to the steel core, forming an alloying molecular-level structure on the copper-steel joint surface, and the bimetal interface is completely combined, so that the ductile metallurgical connection between copper and steel is realized. And form the whole.
Copper flat steel advantages:
1) The copper layer and the steel rod are molecularly integrated. When the grounding rod penetrates into the soil, it will not bend or break.
2) The copper layer is uniform, the purity of the copper is high, and the strength of the steel core is high.
3) Strong corrosion resistance, no dislocation, cracking, cracking.
4) Good electrical conductivity and stable electrical performance.
5) Quasi-guaranteed quality. The copper layer must be greater than 0.070mm to guarantee a lifetime of more than 30 years.
The company's copper-plated flat steel is produced by world-class electroplating technology. It is electroplated on low-carbon steel with a purity of 99.9% or more. The thickness of each point of the copper plating layer is 0.050mm or more. Application: for equipment Ground lead wires, horizontal ground conductors, cable trenches, and horizontal grounding conductors of the towers provide easy wiring. Copper-plated flat steel has great advantages compared to other horizontal ground conductors: it is cheap. Although the unit price of copper-plated flat steel is higher than the unit price of galvanized steel, its current conducting capacity and service life are stronger than that of galvanized steel. Because the copper-plated flat steel has higher current conduction capacity than galvanized steel, the same drainage capacity and grounding resistance must be achieved in the same grounding project. The amount of copper-plated flat steel is less than that of galvanized steel. Comprehensive comparison in the same grounding project copper flat steel cost and steel grounding system cost is equivalent. From a long-term comparison, the lifespan of a copper-plated flat steel grounding system is as long as 40 years, while the grounding system using galvanized steel has a maximum service life of only 15 years. Grounding systems using galvanized steel are excavated for maintenance and renovation every few years. Retrofitting a grounding system is more costly and time-consuming than creating a new ground. In the long run, the cost of copper-plated flat steel is lower than that of galvanized steel. Excellent anti-corrosion performance, with a useful life of up to 40 years.
Galvanized flat steel installation of copper corrosion resistance is more than ten times that of steel, copper plating is three times more than galvanized. The corrosion resistance of copper-plated steel is close to that of pure copper. The surface of copper will have an oxide with strong adhesion (Cu-Cu(OH)2), which has a good protective effect on internal materials and blocks further corrosion. Formation. Copper-plated steel is commonly used in European and American national grounding systems. UL467 is the quality certification standard for this type of grounding material. Chapter 9 on page 11 of this standard specifies that the thickness of copper plating material for ground rods must be greater than 0.25mm. Copper-plated stranded wire and copper-plated flat steel larger than 0.070mm copper plating material to ensure that the ground network for 40 years maintenance-free. Strong current conduction capability. At a temperature of 20C, the resistivity of copper is 17.24×10-6 (Ω•mm), and the resistivity of steel is 138×10-6 (Ω•mm). Assuming that the conductivity of copper is the reference value 1 (ie, 100%), the electrical conductivity of the angle steel and the galvanized round steel is only 8.6%, the electrical conductivity of the copper-plated steel exceeds 20%, and the electrical conductivity of the copper-plated steel strand is It is 30%. Under the action of high-frequency currents such as lightning currents, the copper-plated steel material will produce skin effect, and the conductivity is close to that of pure copper, which is much higher than that of the steel grounding body. In addition, the magnetic permeability of copper relative to vacuum is 1 and the steel is 636 times. When lightning current or fault current is passed, the impedance of copper conductor is much smaller than that of steel ground. Therefore, the probability of side attack caused by the rise of ground potential due to impedance decrease very much.
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