1. Zinc - 730 pounds in a lifetime
Zinc, shining silver and slightly blue-gray, is the third most widely used non-ferrous metal after aluminum and copper. According to a U.S. Bureau of Mines statistics, an ordinary person consumes a total of 331 kilograms of zinc in his lifetime. The melting point of zinc is very low, so it is also an ideal pouring material.
Material characteristics: health care, anti-corrosion, excellent castability, excellent anti-corrosion, high strength, high hardness, cheap raw materials, low melting point, anti-creep, easy to form alloys with other metals, health care, fragile at room temperature, ductility about 100 degrees Celsius.
Typical use: electronic components. Zinc is one of the alloy materials that form bronze. Zinc also has cleanliness and corrosion resistance. In addition, zinc is also used in roof materials, photo engraving discs, mobile phone antennas and shutter devices in cameras.
2.The most common form of chromium is used as an alloy element in stainless steel to enhance the hardness of stainless steel. The chrome plating process is usually divided into three types: decorative plating, hard chrome plating and black chrome plating. Chromium coating is widely used in the engineering field. Decorative chromium coating is usually coated outside the nickel layer as the highest surface layer. The coating has an exquisite and delicate mirror polishing effect. As a decorative post-treatment process, the thickness of the chromium coating is only 0.006 mm. When planning to adopt the chromium coating process, the dangers of this process must be fully taken into account. In the past decade, it has become more and more obvious that hexavalent decorative chromium water is replaced by trivalent chromium water, because the former is very carcinogenic, while the latter is considered to be relatively less toxic.
Material characteristics: very high finish, excellent anti-corrosion performance, hard and durable, easy to clean, low friction coefficient.
Typical use: Decorative chrome plating is a coating material for many automotive components, including door handles and buffers. In addition, chrome is also used in bicycle parts, bathroom faucets, furniture, kitchen utensils, tableware, etc. Hard chrome plating is more used in industrial fields, including random memory in operation control blocks, jet engine components, plastic molds and shock absorbers. Black chrome plating is mainly used for musical instrument decoration and solar energy utilization.
