Abstract
Keywords: Electrolytic process, Thermal reduction, lightest, reactive, Surfaces treatments, recyclability, HPDC
Magnesium is the 8th most abundant element in the earth's crust and its extraction is done by Electrolytic process and Thermal reduction. These processes are costly (technically and economically). It has good properties: the lightest of all structural metals, conserves weight without sacrificing strength and rigidity which can be an alternative material for inner components as seats, window regulators or steering wheels in order to reduce the weight and therefore saving fuel consumption (CO2 emissions). Another important property is its recyclability. Mg is very reactive, that is why it can be alloyed (Al, Zn, Rare earths, Be), and receive surface treatments as the electrochemical one. The most common manufacturing process is High Pressure Die-Casting. In general there are three main types of HPDC alloys: The AZ91 which exhibits good combination of strength, ductibility and castability. The AM60 and AM50 for high energy absorption applications, and the ones used for high temp. Applications such as the AE42 and AS31 (powertrain at temperatures up to 150ºC and 200ºC). The alloys are produced in ingot form. Finally, thanks to its attractive characteristics some pioneering companies in Europe are starting to integrate it in its products.