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It is important to prevent corrosion of copper clad aluminum wire
- Feb 08, 2018 -

The copper clad aluminum wire is the main body of the aluminum conductor, and the copper wire with a certain amount of copper coating on the outside can be used as the conductor of coaxial cable and electric wire and cable conductor in electrical equipment.

Because the main function of the wire is to transmit the signal, its current is very small.

In particular, high frequency signal transmission is completely run in the outer conductor, so copper clad aluminum wire can replace the copper wire of the same specification.

Compared with pure copper conductor, copper clad aluminum wire has obvious advantages: first, it is light weight, convenient for transportation and installation, and can reduce labor cost.

Secondly, there are obvious economic benefits, and the separation of pure copper clad layer and aluminum conductor is almost impossible, and additional anti-theft effect can be received.

However, due to the inherent prejudice of copper clad aluminum wire, there are some disadvantages which are more prone to corrosion than copper wire, which restrict its development and promotion.

How to prevent the corrosion of copper clad aluminum wire is the key to its application.

Copper clad aluminum wire, copper and aluminium are two kinds of electrode potential of different metal, on its face copper and aluminum exposed in atmosphere, if the air humidity is bigger, the end will be adsorbed water molecules and accumulate into tiny droplets in the air, water and sulfur dioxide in the air, the formation of corrosive sulfuric acid solution, as a result, the anode, cathode, electrolyte solution and electronic circuit consisting of a corrosion cell is produced.

Corrosion cells are the result of damage to the metal material, but not to the outside world. In this corrosion cell, the electrode potential of aluminum is low and corroded.

The best way to avoid electrochemical corrosion of copper clad aluminum wire ends is to block the end head and atmosphere. For now, there are two main ways to solve this problem:

1. Electroplating method: copper plating on the joint of copper clad aluminum wire, but it takes too long.

But the company that produces copper clad aluminum line USES the problem is not big, because can many joint electroplating together.

The difficulty is that it is difficult to have copper on the outside.

2. Copper paint finish: dry in two minutes, suitable for color and copper.

This is very convenient for users who use copper clad aluminum wire.

Because the user can cut the wiring in any part, as long as immediately on the section of the quick dry paint, can avoid corrosion.

At present, the copper clad aluminum wire has been widely used in the cable TV industry, and the copper clad aluminum wire has become the standard material of coaxial cable.

It is a replacement product of copper wire, which has the advantages of reasonable utilization of natural resources, lower production cost and convenient engineering construction.

In China, with the gradual understanding and correct understanding of copper clad aluminum wire, the development prospect of copper clad aluminum wire will be very broad.