http___maris-eko.com_lokacija_50-aluminij_1.xml
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The Aluminium The aluminum or aluminum (Aluminium) is the chemical element with the symbol Al and atomic number 13. Argyrolefko is a metallic element belonging to Group III A (13) of the periodic system with boron. It is the most abundant metal in Earth’s crust and the whole third (3 rd) most abundant chemical element in the whole earth, after oxygen and silicon. When weight is approximately 8% of the crust. However, it is very reactive to chemicals found in nature as free metal. Contrast, is united in more than 270 different minerals. The main source for the industrial production of the metal is bauxite. The metal aluminum has (seemingly) great ability to resist corrosion. This basically happens because the report of the metal in the atmosphere forms a momentary one minutes superficial, non-visible oxide layer, which prevents deeper erosion (phenomenon of Passivation). Also, because of the relatively low density and high ability to create a wide variety of alloys, it became a strategic metal for the aerospace (and other) industry. It is also extremely useful in the chemical industry, both as a catalyst unchanged, and the form of different compounds
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Aluminij je srebrno bijeli kemijski element simbola Al i atomskog broja 13. Najprisutniji je metal u Zemljinoj kori, a tre?i naj?e?i element nakon kisika i silicija. ?ini oko 8% mase Zemljine ?vrste povrine. Nalazi se u kombinaciji vie od 270 razli?itih minerala. Mala teina, ?vrsto?a (u legurama), otpornost na koroziju i elektri?na vodljivost (62% vodljivosti bakra) ?ine ga pogodnim za razli?ite uporabe, kao to su proizvodnja vozila i aviona, gra?evine (okviri prozora i vrata) i nadzemni elektri?ni kabeli.