Copper is a transition metal with an atomic number of 29, a density of 8.92g/cm3, and a melting point of 1083.4. It has good thermal and electrical conductivity, so it is widely used as a conductor. However, in humid air, the copper surface reacts chemically with oxygen to form Cu2(OH)2CO3. A patina. Usually, the copper oxidation of cable plants is manifested as black surface, which is a phenomenon of copper conductor surface oxidation that troubles many cable companies and users. However, in addition to the production process, there are various factors that cause wires and cables to turn black during use, but consumers can't think about the reasons behind it. Next, we will share some easily overlooked reasons for wire and cable oxidation:

1: The cable connector is improperly handled

The cable connector seal is not packaged, resulting in air intrusion into the copper conductor black, most of the cable connector packaging master will be directly sealed with insulation tape, in fact, insulation tape is not waterproof, there is a layer of glue, long time will also make the cable black.

2: The insulation is damp

This is also very common and usually occurs on cable joints in direct buried or drain pipes. If the cable joint is not qualified, the joint will enter the water or mix with water vapor in humid climate conditions, and the cable will become black after a long time. This phenomenon is more common in hot summer, because the humidity in the air is relatively high in summer, and the temperature will accelerate the oxidation reaction of copper conductors.

3: Construction and installation

Some users lay and install cable construction is not standard, easy to cause mechanical damage; Civil engineering construction on a directly buried cable is also prone to damage the cable in operation. If the local damage to the copper conductor of the cable is long in the underground wet or exposed surface, it will produce oxidation and black.

In addition to the above reasons for the black color of the cable port, the easy blackening of copper also shows the more important problem, that is, the poor quality of copper, which accounts for most of the cost of the cable. If the quality of the copper is not good, something else is wrong. After taking protective measures, the copper is still oxidized and black, and it should be replaced in time.

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Hotline: 16678668098