Fun talk about the development of aluminum metal
[China Aluminum Industry Network] Now that we have entered the earth and applied aluminum with a wide range of space, we can't help asking why the earlier used and currently widely used metals are not aluminum in the earth's crust.
Reference to the potential table, metal melting point, metal liveliness, reduction of aluminum and other technical reasons, here is not an academic description. Let's talk about fun.
The sewer pipe uses lead, and the tap pipe uses copper. Commonly used gold, silver, copper, tin, lead, gold and silver have become the trading currency of the Celestial Kingdom, and they are listed as precious metals. Copper, tin and lead fly into ordinary people's homes.
What was more, at the time, people took tea as teapots, and lead sugar (lead acetate) was used as a condiment because of its sweet taste. As a result, excessive intake of lead, poisoning poisoning, silly silliness, and sterile infertility were all due to people's lack of understanding of metals at the time.
Until iron was found, it seemed as if a new door had been opened. As we all know, the gold density 19 silver 11 copper 8.9, the proportion of iron 7.8 at the time considered very light and very light metal. The key is cheap! Iron is more and more common. However, this matter did not end, after the emergence of aluminum.
Relatively speaking, aluminum is still a very young metal. The earlier aluminum was replaced with potassium. At that time, the aluminum refining technology was still underdeveloped, so the aluminum production was very low, and aluminum was a very rare precious metal. More expensive than gold, Napoleon used aluminum to make the crown in order to realize his dignity and speciality. He also has a set of aluminum cutlery. It was a very extravagant thing at the time.
Aluminium is extremely light (2.7), and it is also corrosion-resistant. It is more intimidating that the aluminum content in the earth's crust is high. People are beginning to believe that an era of aluminum is coming. Things such as aluminum alloys, aluminum pans, etc. are closely related. However, aluminum is not very friendly to people. The harm of aluminum ions to humans is well-known, the aluminum pot aluminum spoon spread on the people's harm has also made everybody doubtful. Later, I didn't know which of the wok irons the cattle said, and aluminum cutlery was almost finished.
In fact, it is not because of this, because the problem of corrosion of metals is getting worse. Everyone starts to consider replacing other materials with metal materials. The status of aluminum has been challenged. For example: Plastic steel, plastic steel cheaper than aluminum, but also thermal insulation, but also insulation, but also soundproofing, but also colorful, this piece of aluminum alloy doors and windows of home decoration still has a huge space for development. However, aluminum alloy cars are still many. After all, it is a metal material and there are many other irreplaceable advantages. However, from the perspective of the entire historical process, the more active metals are, in most cases, refined into single-elements or alloys, and the later, this is determined by metal activity.
stainless steel, sink strainer,fruit vegetable washing drain basket,kitchen tool,draining rack, draining basket.
Shenzhen Lanejoy Technology Co.,LTD , http://www.copper-nut.com