Copper is a pink or red metal. Since ancient times, it has been mined for technical use.
Physical and chemical properties of copper
Copper has a high level of ductility. The element consists of two nuclides. The radius of the ion with a positive charge is:
• up to 0.06 nm (if the coordination value is 2);
• up to 0.091 nm (when the indicator is 6).
This metal is characterized by variable levels of oxidation. The electrical conductivity of copper ranges from 55.5 MSm /m to 58 MSm /m. The boiling point is very high - 2657 ° С. And the metal melts at + 1083 ° C. The density index is 8.92 g /cm3 - this is 3 times more than that of aluminum. Copper is numbered 29 in the periodic table. It belongs to the noble metals of the fourth period. Features of the element - the ability to form complexes and diamagnetic quality. Cooprum poorly enters into chemical reactions. In a dry place, it practically does not change. In conditions of high humidity and the presence of carbon dioxide, a patina forms on the metal - a green shell that performs a protective function. The element can interact with iron salts. As a result of the reaction, the element Fe is reduced, and copper turns into a solution. This process is used to remove the dusty layer from decorative ornaments. Industry uses the ability of copper to form complex compounds of great stability. For example, double salts and ammonia mixtures.
A kind of copper conductors
Metal is widely used in the manufacture of copper buses and wires. The most common brands include:
• М1 (contains 0.1% impurities);
• М0б (0.03%);
• M2 (0.3%).
Standard sizes of products depend on the selected GOST. According to the level of plasticity, the following conductors are distinguished:
• soft;
• solid tires.
Copper electrical busbars М1Т or М1М are widely used in various industries and in residential buildings. There is also an oxygen-free type, which is produced without the use of oxides. Has high strength.
Copper bars are:
• isolated;
• hard;
• flexible;
• perforated;
• wicker;
• with a round section.
Flexible copper bus is used as an alternative replacement for cables of different diameters .Bus manufacturers guarantee the storage of conductors.
Scope
Copper is used to make various cables. The wires are distinguished by their special magnetic properties and low electrical resistance. Durability, light weight and the possibility of mechanical resistance.
