BerylliumBeryllium is used in many aluminium-magnesiumAluminium-magnesium alloys to minimize molten metal oxidationOxidation and oxide entrainment. As berylliumBeryllium containing dust and fumes have detrimental effects on health, its use has to be limited. The reduction potential of berylliumBeryllium has been investigated for AlMg3, AlMg5 and AlMg10 cast alloysCast alloys as well as Al99.85 as a reference material by thermogravimetric analysis (TGA). The samples were alloyed with Be contents between 3–57 ppm to measure the oxidationOxidation inhibiting effect over time. During TGA, the weight gain by oxidationOxidation of each sample was measured continuously for 21 h at 750 °C in laboratory scale. The results show that the Be inhibiting effect is lost after a period of time. The samples were analysed by X-ray Photoelectron Spectroscopy (XPS), Auger Electron Spectroscopy (AES) and electron microscopy (SEM) to further understand the oxidationOxidation mechanism. Finally, the results were used to derive a predictive modelPredictive model for the required Be content to protect an AlMg alloy.
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- Beryllium Reduction Potential in AlMg Cast Alloys
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