ã€China Aluminum Network】 Why does aluminum not rust? The question was wrong. Aluminum rusted, but rust was not rusted like iron until rust was finished. Metal oxidation by the oxygen in the air is rust. Aluminum reacts with oxygen to form aluminum oxide, which is aluminum rust. Aluminum rust is very thin, its thickness is only one ten-thousandths of a millimeter, but it is very hard and very wear-resistant. It clings to the surface of aluminum, so that the inside of the aluminum can not touch the outside air, prevent the aluminum from continuing to rust. Tips: Alumina films also have "busters": one is a base and one is an acid. Alumina encountered a chemical reaction and formed compounds that were very easy to fall off. The dishes often contain acid-base ingredients, so no! want! Place the wine in the aluminum container so as not to damage the aluminum pan. In addition, no! want! Because the surface of the aluminum pan is gray and embarrassed and rubbed with sand, although you rub a layer of oxide film, the aluminum pan is brighter, but this can only make you happy for a while. Losing the protective film on the surface, the aluminum pan will continue to oxidize, the color of aluminum oxide gray will continue to show in front of your eyes, and the aluminum pan will become thinner and thinner, which will affect its service life. Why is aluminum non-ferrous metal? Non-ferrous metals in the narrow sense, also known as non-ferrous metals, are collectively referred to as all metals other than iron, manganese, and chromium; the generalized non-ferrous metals also include non-ferrous alloys (based on a non-ferrous metal (usually greater than 50%), adding a Alloy composed of several other elements). Why is aluminum a metal that can fly? The density of aluminum is only 2.7g/cm3, and there is a dense Al2O3 film on the surface, which prevents the internal aluminum from reacting and is not easily oxidized. It is a commonly used material for aircraft. Modern airplanes have 70% of aluminum and aluminum alloys, so they are called metals that can fly. Why aluminum is trivalent? In simple terms, the external arrangement of aluminum atoms is 2,8,3. The number of electrons in the outer layer is less than that of the other, the structure is unstable, and the three electrons are easily lost. Therefore, the three electrons often appear positive, but it is clear that the three electrons are more stable than the outer one electron and the magnesium is more stable than the outer two electrons. Aluminum is not as active as sodium and magnesium. Why are aluminum surfaces generally treated? If the aluminum profile is not surface-treated, the appearance is not beautiful, and it is easily corroded in moist air, so that it is difficult to meet the requirements of high decorativeness and strong weather resistance of the aluminum profile in the building material, in order to improve the decorative effect and enhance the corrosion resistance. As well as extending the service life, aluminum profiles are generally surface treated. Why is aluminum more expensive than iron? Although aluminum reserves more than iron in the earth's crust, the production process of aluminum is more complex than iron. Aluminum is a relatively active metal element. Smelting requires electrolysis, and the cost to be consumed in the entire production process is higher than that of iron. Therefore, the price of aluminum is higher than that of iron. Why canned cans use aluminum cans? Aluminum cans have the following advantages: not easily broken; light weight; opaque. Wanglaoji and Babao porridge are hard iron cans because the packaged goods are free of pressure and aluminum cans are easily deformed. The pressure inside the soda is larger than normal pressure. Under pressure, there is no need to worry about deformation. And aluminum can guarantee the pressure of carbon dioxide in soft drinks, so that the soft drink can achieve a better taste effect. What are the uses of aluminum? The use of aluminum is tens of millions, but it can be summarized as follows: Aluminum uses Aerospace aluminum is used to make aircraft skins, fuselage frames, girders, rotors, propellers, mailboxes, siding and landing gear props, as well as rocket forging rings, spacecraft siding, and more. Widely used in beverages, food, cosmetics, pharmaceuticals, cigarettes, industrial products and other packaging. Aluminum for transportation can provide a full range of aluminum alloy materials for automotive use. Large-scale porous materials for subways and light rails are pioneering and innovative, satisfying the localization requirements for subways. It is used to manufacture automobile body, subway vehicles, railway passenger cars and high-speed passenger car body structural parts. , windows, doors and shelves, automotive engine parts, air conditioners, radiators, body panels, wheels, and ships. Packaging aluminum aluminum cans cans can be used to measure the level of aluminum processing in a country. Aluminum is mainly used as a metal packaging material in the form of thin plates and foils to make cans, lids, bottles, buckets, and packaging foils. The aluminum printing industry in print has bid farewell to "lead and fire" and entered the era of "light and electricity"... The aluminum-based PS version has provided strong support for this change in the printing industry. Aluminum for electronic home appliances is mainly used in various busbars, overhead lines, conductors, electrical components, refrigerators, and cables. Aluminum foil for air conditioners has excellent deep-drawing performance, high strength, and good elongation, reaching the level of imported products of the same category; high-performance electrolytic capacitor foil pioneering and innovative. Aluminum for architectural decoration Aluminum alloys are widely used in building structures, doors, windows, suspended ceilings, and decorative surfaces because of their good corrosion resistance, sufficient strength, excellent process properties, and weldability.