1. Why does aluminum not rust?
Many users and friends have such a misunderstanding that aluminum also rusts, but aluminum does not rust like iron until it rusts. Metal is rusted when it is oxidized by oxygen in the air. Aluminum reacts with oxygen to produce aluminum oxide, which is aluminum rust. Aluminum rust is very thin, its thickness is only one ten-thousandth of a millimeter, but it is very hard and very wear-resistant. It clings to the surface of the aluminum so that the aluminum inside does not come into contact with the outside air and prevents the aluminum from continuing to rust.
2. Why is aluminum a non-ferrous metal?
Non-ferrous metals in the narrow sense, also known as non-ferrous metals, are a general term for all metals other than iron, manganese, and chromium; non-ferrous metals in the broad sense also include non-ferrous alloys (based on a non-ferrous metal (usually greater than 50%), adding Alloys composed of several other elements).
3. Why do aluminum profiles generally require surface treatment?
If the aluminum profile is not surface-treated, the appearance will not be beautiful, and it will be easily corroded in humid air, so it is difficult to meet the requirements of high decorative and strong weather resistance for aluminum profiles in building materials. In order to improve the decorative effect and enhance the corrosion resistance In order to prolong the service life, aluminum profiles generally require surface treatment.
4. Why is aluminum more expensive than iron?
Although aluminum has more reserves in the earth's crust than iron, the production process of aluminum is more complicated than that of iron. Aluminum is a relatively active metal element. It needs to be smelted through electrolysis, and the cost consumed in the entire production process is higher than that of iron. , so the price of aluminum is higher than that of iron.
5. What are the uses of aluminum?
There are tens of thousands of uses for aluminum, but they can be summed up in the following major uses:
Uses of Aluminum Materials Aluminum materials for aerospace are used to make aircraft skins, fuselage frames, girders, rotors, propellers, fuel tanks, wall panels and landing gear pillars, as well as ships, rocket forging rings, and spacecraft wall panels. Widely used in the packaging of beverages, food, cosmetics, medicines, cigarettes, industrial products, etc. Aluminum materials for transportation can provide all kinds of aluminum alloy materials for automobiles. Large porous profiles for subways and light rails fill the gap in China and meet the requirements of localization of subways. Used to manufacture automobiles, subway vehicles, railway passenger cars, and high-speed passenger car body structures. Parts, doors, windows and shelves, automotive engine parts, air conditioners, radiators, body panels, wheels and ship materials. Aluminum all-aluminum cans for packaging are a sign of a country's aluminum processing level.
Aluminum is mainly used as metal packaging materials in the form of thin plates and foils to make cans, lids, bottles, barrels, and packaging foils. Aluminum for printing The printing industry bid farewell to "lead and fire" and entered the era of "light and electricity"... Aluminum-based PS plates provide strong support for this transformation of the printing industry. Aluminum materials for electronic home appliances are mainly used in various busbars, wiring, conductors, electrical components, refrigerators, cables and other fields. Aluminum foil for air conditioners has excellent deep-drawing performance, high strength, and good elongation, reaching the level of imported similar products; high-performance electrolytic capacitor foil fills the gap in China. Aluminum alloys for architectural decoration are widely used in building structures, doors and windows, suspended ceilings, decorative surfaces, etc. due to their good corrosion resistance, sufficient strength, excellent process performance and welding performance.