Explanation

The tin based alloy has the following characteristics: low melting point, relatively low strength and hardness, good thermal conductivity, atmospheric corrosion resistance, and easy weld with steel, copper, aluminum and other materials, so it is an excellent solder. In addition, it also has outstanding antifriction performance, suitable for making bearing materials. Due to its excellent corrosion resistance, tin alloys are also widely used as coating materials in various fields, including but not limited to the following: Sn-Pb based alloys, such as 62% Sn, are commonly used to prepare bright and corrosion-resistant hard coatings. Sn Ni series alloy, such as 65% Sn, are usually used to prepare decorative corrosion resistant coatings, which are widely used in integrated circuits, clock components, household appliances, instruments and meters and other fields. Sn Zn alloy, such as 75% Sn, is commonly used in electronic components, TV, radio and other products. Sn Cd series alloy coating, with seawater corrosion resistance, has been applied in the shipbuilding industry. In addition, Sn Pb alloy is a widely used solder, which often contains 38.1% lead eutectic alloy, with low melting point (183 ° C) and is easy to weld with other metals. It is widely used in the electrical instrument industry, such as the sealing of automotive radiators, air conditioners, heat exchangers, weld of electrical contact elements of household appliances, and weld of motors and telephone lines. Tin can also form alloy solder with other metals (such as antimony, silver, indium, gallium, etc.), which has the characteristics of high strength, non-toxic and corrosion resistance. In addition, tin also forms a fusible alloy with bismuth, lead, cadmium, indium and other metals, which is widely used as a safety materials for electrical equipment, steam equipment and fire protection devices, and as a medium and low temperature solder. tin-base bearing alloy is usually dominated by Sn Sb Cu and Sn Pb Sb series, and its strength and hardness can be improved by adding copper and antimony. The composition of tin-base bearing alloy is roughly the same, and together with lead-base bearing alloy, it is collectively called Babbitt metal alloy. In addition, Sn-13.5Pb-2.5Sb alloy can be rolled into sheet or foil, which is commonly used to manufacture capacitors and electrical and instrument parts. While Sn-5Sb alloy is usually used to make bullet primer gaskets and instrument parts, Sn-18Sb-0.5-3.0Cu alloy is often used to make household utensils, such as tea sets.

Classification