Aluminum is a metal element with the symbol Al and the atomic number 13. Its single substance is a silvery-white light metal. It is ductile. The products are often made into rods, sheets, foils, powders, strips and filaments. In humid air, it can form an oxide film to prevent metal corrosion. Aluminum powder can burn violently when heated in air, and emits a dazzling white flame. It is easily soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solutions, but difficult to dissolve in water. Relative density 2.70. Melting point 660℃. Boiling point 2327℃. The content of aluminum in the earth's crust ranks third only to oxygen and silicon, and it is the most abundant metal element in the earth's crust. The development of the three major industries of aviation, construction and automobiles requires that the material properties have the unique properties of aluminum and its alloys, which greatly facilitates the production and application of metal aluminum. It is widely used.
total 0 Sheet,Only 5 images can be uploaded, each less than 5m.