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How pure is pure aluminum

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The content of aluminum in the earth's crust is second only to oxygen and silicon, ranking third, and is the most abundant metal element in the earth's crust. The development of three important industries of aviation, construction and automobile requires that the material properties have the unique properties of aluminum and its alloys, which is greatly beneficial to the production and application of this new metal aluminum. The application is extremely extensive.
So what are the characteristics of pure aluminum, how pure
1. Low density and enhanced
The density of pure aluminum is close to 2700 kg/m3, which is about 35% of the density of iron. Pure aluminum can double its strength by cold working. Moreover, it can be alloyed by adding elements such as magnesium, zinc, copper, manganese, silicon, lithium, and antimony, and further strengthened by heat treatment, and its specific strength is comparable to that of high-quality alloy steel.
2. Easy processing
Aluminum is cast by any of the casting methods. Aluminum has good plasticity, can be rolled into thin plates and foils; drawn into pipes and filaments; extruded into various civil profiles; can be machined by milling, milling, boring and planing at the maximum speed that most machine tools can achieve.
3. Corrosion resistant and conductive and thermally conductive
The surface of aluminum and its alloys tends to form a dense, strong Al2O3 protective film. This protective film will be destroyed only by the intense action of halogen ions or alkali ions. Therefore, aluminum has a good resistance to corrosion and water corrosion in the atmosphere, including industrial atmospheres and marine vapors. It can resist the corrosion of most acids and organic substances, and it can resist the corrosion of weak alkali solution by using corrosion inhibitor. It can improve the corrosion resistance of aluminum alloy by protective measures. The electrical and thermal conductivity of aluminum is not less than silver, copper and gold.
4. No low temperature brittleness
Aluminum is below zero degrees Celsius, and as the temperature decreases, the intensity and plasticity of the injustice will not decrease, but will increase.
5. Beautiful and reflective
The polished surface of aluminum has a reflectance of more than 80% for white light, and the higher the purity, the higher the reflectance. At the same time, aluminum has good reflection properties for infrared rays, ultraviolet rays, electromagnetic waves, heat radiation, and the like. Aluminum and its alloys have a silver-white luster due to their strong reflective properties. After machining, it can reach a high degree of finish and brightness. Through anodizing and coloring, colorful, dazzling aluminum products can be obtained.
6. No magnetism, no impact, no spark
7. Sound absorbing
8. Nuclear radiation resistance

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