Magnesium alloy has a low melting point and small heat capacity. When heated in the air, it gets oxidized fast, and it is easy to burn when overheated. When in a melting state without any flux, it can be burned violently. Therefore, the magnesium alloy must always be in flux or protective atmosphere during the casting process. The quality of molten casting depends greatly on the quality of the flux and the melt protection.
