The history of zinc. Mechanical and physical properties of zinc alloys.

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Technical specifications

Zn is an element of the second group of the secondary subgroup, the IV period… Atomic weight is 30. Under normal conditions, it is a metal of a white-bluish color, (in the air dims, covered with a very thin layer of ZnO oxide). The specific gravity is 7,133 g / cm3. The melting point is 419.6 ° C, the boiling point is 906.2 ° C. In nature, zinc in its native form is not found. This element is extracted from polymetallic ores

History

Zinc alloys humanity has enjoyed since time immemorial. For example, brass — an alloy of copper and zinc — was known even in ancient Egypt, China and India. In the past, brass was often used for making jewelry and expensive metal dishes. Over the years, it was not possible to separate pure zinc. In 1746, he developed a method for the preparation of this metal by calcination of a mixture of ZnO oxide with coal in refractory clay retorts without air, with the condensation of zinc vapor in special refrigerators. On an industrial scale, the smelting of this metal was started at the end of the 17th century.

Delivery, price

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