What is the difference between aluminium and aluminum alloy of the excellent performance?
4, but aluminum, its toughness is relatively poor, relatively soft, easily deformed. And aluminum, although similar density, however, tough and difficult to deformation, can be used as flying materials.
3, silver-white light metal. Malleable. Goods often made rod, sheet, foil, powder, ribbon and filamentous. The humid air to form an oxide film layer to prevent metal corrosion. Aluminum foil and heated in air can burn fiercely, and issued blinding white flame. Soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, insoluble in water. The relative density of 2.70. Melting point 660 ℃. Boiling point of 2327 ℃. Aluminum element in the crust after oxygen and silicon content, ranking third, the crust is the most abundant metallic element. Three important developments in aviation, construction, automotive industry, require material properties with unique properties of aluminum and its alloys, which greatly benefit the production and application of this new metallic aluminum. Wide range of applications.
1, similar to their density. Are so-called lightweight materials.
2, commonly used aluminum alloy elements copper, zinc, manganese, silicon, magnesium and the like, the early 20th century invention by the German Alfred Wilm, greatly helped the development of the aircraft, after World War I German aluminum components are classified as state secrets. Compared with ordinary carbon steel is lighter and corrosion performance, but not as good as the corrosion resistance of aluminum. Protective oxide layer in a clean, dry environment aluminum alloy formed on the surface.
