Copper Clad Aluminum Winding Wire is a wire with aluminum core wires as the main body and coated with a certain amount of copper layer, which can be used as conductors for coaxial cables and wires and cables in electrical equipment. Because the main function of this kind of wire is to transmit signals, the current flowing through it is very small. In particular, high-frequency signal transmission is completely carried out on the outer layer of the conductor, so the copper clad aluminum winding wire can replace copper wires of the same specification.
Compared with pure copper wires, copper clad aluminum winding wire have obvious advantages: first, they are light in weight, convenient for transportation and installation, and can reduce labour costs; Second, it has obvious economic benefits. At the same time, it is almost impossible to separate the pure copper coating from the aluminum core wire, and it can also receive the additional anti-theft effect.
However, the development and popularization of copper clad aluminum winding wire are restricted by the inherent prejudice of people and the disadvantage that copper wires are more corrosive than copper wires. How to prevent the copper clad aluminum winding wire from being corroded has become the key to its popularization and application.
Copper and aluminum in copper clad aluminum winding wire are two metals with different electrode potentials. When copper and aluminum are exposed in the atmosphere on its end face, if the humidity in the atmosphere is relatively high, the end face will absorb water molecules in the air and accumulate into fine water droplets, which combine with sulfur dioxide in the air to form corrosive solution sulfuric acid. Thus, a corrosive battery composed of anode, cathode, electrolyte solution and an electronic circuit is generated. Corrosive cells are short-circuited primary cells that cause damage to metal materials and do no useful work to the outside world. In this corrosive cell, aluminum is corroded due to its low electrode potential.
At present, copper clad aluminum winding wire has been widely used in the cable TV industry, and it has become the standard material for coaxial cable. It is an updated product of copper conductor and has the advantages of reasonable utilization of natural resources, reduction of production cost, the convenience of engineering construction, etc. In China, with the gradual understanding and correct understanding of copper clad aluminum winding wire, the development prospect of copper clad aluminum winding wire will be very broad.