This metal is soft, dense, ductile and malleable. It is bluish white when cut, and turns a dark grey when exposed to air
. Lead is used for construction, in the production of batteries
for haulage and bullets for firearms, and, in its liquid state, as a coolant for nuclear reactors, and sometimes in an eutectic alloy
. Lead is also a component of pewter
and of metal alloys used for welding
Lead is harmful, as are its compounds; it also possesses a relatively low electrical conductivity. It can be made harder with the addition of a small amount of antimony
. This alloy has long been used for printing characters.
È Antimony is highly resistant to corrosion; it is not affected by sulphuric acid
, but melts in nitric acid
. È Antimony also has the important property of absorbing radiation. It is assumed that all existing lead is derived from the decay of Uranium-238
which turns into lead with a half-life
of about 4.51 billion years. In the early twentieth century, however, it was believed that lead derived from the decay of radium
Lead occurs naturally in the environment. However, most lead found in nature is produced by human activities. Due to the application of lead in gasoline
an unnatural lead cycle has existed. Lead burns in car
, combining with other elements to form chlorides, bromides and oxides.
Our products are largely for the construction industry and batteries for motor propulsion.