Tin alloys, such as lead tin alloy, are used for making electronic components. They have a low melting point, so they do not damage sensitive components. They are also highly corrosion resistant, and are a safer alternative to solder that is made from lead.
Tin is a common metal in many types of alloys, and it is commonly added to steel as an additive to reduce its weight. It also makes steel stronger and better for welding, as it is more resistant to heat.
There are a wide variety of tin alloys, and the most common is called tin-lead alloy. It is a mixture of tin and lead, with a little copper added to prevent corrosion and add strength.
To make this alloy, tin and lead are melted together until they are a eutectic. This composition of tin and lead is very popular, because it allows for easy soldering.
The molten alloy is allowed to cool and the impurities become crusts, separating them from the purified metal. The molten alloys of tin and lead are then treated with a liquation process to remove the traces of other metals such as copper, arsenic and antimony.
In addition to the eutectic Sn/Pb alloys, there are Sn/Bi alloys that have a lower melting point. These alloys are ideal for use in applications where the temperature of the solder is not critical, but it is still required that the joint retain its strength and other properties at high temperatures.