What are the properties of aluminum?
Sep 08, 2022
Aluminum is a silver-white light metal. It's malleable. Commodities are often made in the form of columns, rods, sheets, foils, powders, ribbons and filaments. In moist air can form an oxide film to prevent metal corrosion. Aluminum powder treated with acid is heated in the air and burns violently with a blinding white flame.
It is easily soluble in dilute sulfuric acid, dilute nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, insoluble in water, but can react with hot water slowly to produce aluminum hydroxide, with relative density of 2.70, elastic modulus of 70Gpa, Poisson's ratio of 0.33. Melting point is 660 ℃. The boiling point of 2327 ℃. It is widely used for its light, good electrical and thermal conductivity, high reflectance and oxidation resistance. The aluminum used to make daily dish utensils is usually called "steel" or "steel". The thermal expansion coefficient of Al at 25 ° C is 0.0000236mm/ ° C or 23.6 PPM *k-1.
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