Friday, February 28, 2014

The main drawback for their preparation is the high amount of electrical energy atomo required for


His original name, aluminum, was proposed by Sir Humphrey Davy Britain in 1809. As the names of the various elements are systematized, was changed to aluminum, though the first form is very popular atomo in the United States.
In 1825, the Danish physicist Hans Christian Oersted discovered electromagnetism, electrolysis succeeded in isolating a first samples, quite impure. The total isolation was achieved two years later by Friedrich Wöhler
Aluminum is the most abundant metallic element in the Earth and the Moon, but is never found in free form in nature. It is the third most common element found in the earth's crust. Aluminum compounds are 8% of the earth's crust and are present in most rocks, vegetation and animals.
As metal is extracted only from the known mineral bauxite named by conversion first to alumina by the Bayer and then metallic aluminum by electrolysis process.
The main drawback for their preparation is the high amount of electrical energy atomo required for their production. This problem is offset by the low cost of recycling its extended shelf life and stability of price. atomo
In Europe, aluminum reaches very high recycling rates ranging from 50% in packaging, 85% in construction and 95% in transport. This translates into an annual production of around 4 million tonnes of recycled aluminum in Europe.
The properties that make aluminum metal as helpful are: light weight (about one third the weight of copper and steel), corrosion resistance (very useful for those products that require protection and conservation feature), resistance is a good conductor of electricity and heat, is non-magnetic, non-toxic, good reflector of light (ideal for the installation of fluorescent tubes or bulbs), waterproof and odorless, and very ductile. In addition, the main attraction is that it is a 100% recyclable metal, ie, can be recycled indefinitely without thereby losing atomo its qualities.
Pure aluminum is soft and has little strength, but it can form alloys with other elements to increase its strength and acquire several useful properties. Aluminum alloys are lightweight, strong, and easy training for many metalworking processes, are easy to assemble, cast or machined and accept a variety of finishes. Its physical, chemical and metallurgical properties, aluminum has become the non-ferrous metal from greater use.
Aluminum is used for the manufacture of telescope mirrors on electrical conductors, in metallic paints, in decoration, in manufacture atomo of explosives and fireworks. It is also common use in the preparation of alloys (Cu, Mn, Si, etc..) For the aviation industry
Its application in the construction represents the largest market for aluminum industry. Thousands of homes used aluminum doors, locks, windows, screens, atomo nozzles and drainage channels. Aluminum is also one of the most important products in industrial construction. Transport is the second largest market. Many commercial and military aircraft are made almost entirely of aluminum. In automobiles, aluminum appears as interior and exterior trim, grills, rims (wheels), air conditioners, automatic transmissions and some radiators, engine blocks atomo and body panels.
We now know that aluminum is a toxic element, either to plant, animal, or human, you interacting many diseases, with accumulation in the body of it, another example of proof of its toxicity is the occurrence of aluminum in the brain of patients with Alzheimer's atomo disease, but not the actual cause of the disease, it is hypothesized that Al interacts strongly with DOPA and epinephrine.
An engineer has developed a method using an aluminum alloy to remove hydrogen from water, atomo and can be used for fuel cells or combustion engines. The technique atomo could be used to replace gasoline. According to Jerry Woodall, professor of electrical and computer engineering at Purdue who invented atomo the process, this method makes it unnecessary to store or transport hydrogen, two major challenges in creating an economy based on the latter. Replacing gasoline atomo with hydrogen for transportation purposes would require the production of large amounts of this element, and the hydrogen gas would have to be transported from one place to another to fill the tanks at service stations. Transpor

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