Interesting about lead
general characteristics
Lead is the 82nd element of the 4th period of the periodic table, where it is designated Pb. This is a fusible metal of bluish-gray color. Has a face-centered cubic lattice, excellent forging, thanks to its high ductility and toughness. It is very easy to melt at t ° only 327.5 ° C. The boiling point is 1740 ° C. It has low thermal conductivity. The surface is covered with an oxide film, which protects the metal from the negative effects of the environment. Obtained from the deposits of intermetallic compounds. The main suppliers are the USA, the EU, Korea, China. Today, the world market price per kilogram of lead is 1.5 cu.
| Physical properties of Pb | |
|---|---|
| Atomic (molar) mass g / mol | 207.2 |
| Atomic number | 82 |
| Density [g / cm3] | 11.34 |
| Melting point t ° C | 327.5 ° C |
| Degree of oxidation | 4, 2, 0 |
| Thermal conductivity K [W / (m · K)] | 35.3 |
| Molar volume cm3 / mol | 18.3 |
Lead alloys
They are conventionally divided into two categories — high-alloy and low-alloy. The first include lead alloys with various special additives that increase the resistance of the metal to external influences. Such additives can increase the antifriction properties, change the melting point and the degree of shrinkage. Low-alloyed alloys include lead compounds with tin, nickel, antimony, cadmium, copper. These alloys increase the corrosion resistance of lead in acidic environments and high humidity conditions. Additives of antimony or copper allow the use of alloys for the production of building materials — sheets, fittings, pipes. Additives of tin make it possible to manufacture low-voltage and power cables. Lead in conjunction with other metals, receives a number of advantages. For example, strength is increased, which makes it possible to use it for joining or soldering pipelines.
Casting of lead
This is a rather complicated process, it is impossible to repeat at home. The casting technology provides for a well-ventilated large room in which the liquid melt is poured into separate molds and kept at a special temperature and a certain pressure. I would like to note that lead pairs are toxic. Poisoning can be quite serious, up to a lethal outcome. But, despite this, it is not possible to dispense with lead today.
Application
The use of lead began from ancient times, for example, before it was bought to produce its own seal, since it is quite easy to apply an impression on its surface. Today it is used in the manufacture of seals for typos of safes, rooms or freight wagons. Most often it is used by industrial chemistry, construction industry, energy. To this day, it remains indispensable for the production of fuel antiketons and car batteries. An important factor is its cheapness, physical and chemical qualities, as well as the possibility of recycling, when the batteries fail.
Recycling
It should be noted that it is possible to dispose of such products only following the norms of SNIP. The lowest prices are for scrap of lead cable. Accept the material only if it is clean. Significantly more expensive is taking scrap of leaded lead, however, if it is without foreign inclusions, which reduce the price. The most expensive is paid scrap of lead typographical font.
Lead Lead
Actively used in construction. It is like for the roofing of buildings, fastenings of fireplace or chimneys. It is used in x-ray equipment. For the repair work of a private home, you can opt for a sheet of lead to cover the roof. Buy lead is also most often a sheet form. It is the most universal and most practical. The sheet can be used, for example, for door lining. Such processing will make the door bulletproof. They are lined with military vehicles, submarines, and also used as breastplates for diving suits.
Where to buy lead
Rather lead will not be a problem if you can use the Internet. LLC «Avek Global» offers sheet lead from the warehouse at the most favorable prices. Our site provides an opportunity to buy any lead semi-finished products quickly enough to be delivered to any CIS region. Through the company’s representative offices you can get acquainted with the commodity catalog. All available products have a corresponding quality certificate. The widest range of goods in the warehouse, as well as comprehensive information will help make a choice. At wholesale orders the system of discounts operates.