26 KB60 KB23 KB200020242013Gándara, María Josefa Freiríaštevilka:3letnik:47str. 261-265ISSN:1580-2949COBISSID:991914URN:URN:NBN:SI:doc-MZJNTCA7enInštitut za kovinske materiale in tehnologijeMateriali in tehnologijealuminijeve zlitinealuminium alloyodpornost proti korozijirecikliranjeuporabaAluminium| Aluminij| kovina izbire| the metal of choice|This article summarizes the importance of aluminium as the metal of choice formany applications. Aluminium is a lightweight, durable metal. It is silvery in appearance when freshly cut, is a good conductor of heat and electricity, and is easily shaped by moulding and extruding. Aluminium has two main advantages when compared with other metals. Firstly, it has a low density, about one-third that of iron and copper. Secondly, although it reacts rapidly with the oxygen in air, it forms a thin, tough and impervious oxide layer that resists further oxidation. This removes the need for surface-protection coatings such as those required with other metals, in particular with iron. All the indications are that the growth in the use of aluminium will likely accelerate. It is expected that in the near future the use of aluminium with specifically improved properties will grow in many applications, meeting the increased economic and ecological demands. Considering the entire life-cycle of an automobile, from the extraction of materials to the final disposal, including recycling and reuse applications, aluminium proves to be a potential alternative to steels in future automotive applicationsČlanek povzema pomembnost aluminija kot izbrane kovine z mnogimi možnostmi uporabe. Aluminij je lahka, zdržljiva kovina. Je srebrne barve, ko je sveže odrezan, je dober prevodnik toplote in elektrike in se lahko oblikuje z ulivanjem v kokile in z ekstruzijo. Aluminij ima v primerjavi z drugimi kovinami dve glavni prednosti. Prva je majhna gostota, okrog ene tretjine gostote železa ali bakra. Druga: čeprav hitro reagira s kisikom iz zraka, tvori tanko, trdo in neprepustno oksidno plast, ki preprečuje nadaljnjo oksidacijo. Zato ni potrebe po površinski zaščiti, kot jo zahtevajo druge kovine, še posebno železo. Kaže, da se bo rast porabe aluminija še nadaljevala. V bližnji prihodnosti se pričakuje, da bo zaradi povečanja ekonomskih in ekoloških zahtev uporaba aluminija s posebnimi, izboljšanimi lastnostmi rastla na mnogih področjih uporabe. Z upoštevanjem celotnega trajnostnega cikla avtomobila, od pridobivanja materiala do odlaganja, vključno z recikliranjem in možnostjo nadaljnje uporabe, aluminij dokazuje, daje mogoča alternativa jeklom v prihodnji proizvodnji avtomobilovTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije