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Magnesium is the third-most-commonly-used structural metal, following iron and aluminium. [58] The main applications of magnesium are, in order: aluminium alloys, die-casting (alloyed with zinc), [59] removing sulfur in the production of iron and steel, and the production of titanium in the Kroll process. [60]
The machinability of magnesium alloys is the best of any commercial metal, and in many applications, the savings in machining costs more than compensate for the increased cost of the material. [ citation needed ] It is necessary, however, to keep the tools sharp and to provide ample space for the chips.
The primary metals in this category are magnesium-based [2] [3] and iron-based alloys, [4] although recently zinc has also been investigated. [ 5 ] [ 6 ] Currently, the primary uses of bioresorbable metals are as stents for blood vessels (for example bioresorbable stents ) and other internal ducts.
The technology was proposed in 2009 based on magnesium and antimony separated by a molten salt. [31] [32] [33] Magnesium was chosen as the negative electrode for its low cost and low solubility in the molten-salt electrolyte. Antimony was selected as the positive electrode due to its low cost and higher anticipated discharge voltage.
Magnesium-thorium alloys have been used in several military applications, particularly in missile construction. The most noted example of this is the ramjet components in the CIM-10 Bomarc missile and Lockheed D-21 drone, which implemented thoriated magnesium in their engine construction.
Aluminium-magnesium alloys are considered to be very corrosion-resistant, making them suitable for marine applications, but this is only true if the -phase exists as a non-contiguous phase. Alloys with Mg contents below 3% are therefore always corrosion-resistant, with higher contents, appropriate heat treatment must ensure that this phase is ...
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A magnesium–air battery has a theoretical operating voltage of 3.1 V and energy density of 6.8 kWh/kg. General Electric produced a magnesium–air battery operating in neutral NaCl solution as early as the 1960s. The magnesium–air battery is a primary cell, but has the potential to be 'refuelable' by replacement of the anode and electrolyte.