Abstract
Mg alloy waste dust can react with water to produce hydrogen in the production of Mg alloy products, which has the possibility to lead to fires or explosions. Firstly, from the perspective of safety management, this paper systematically studies the impact of the difference of hydrogen evolution amount of magnesium based alloy waste dust particles(Mg–Al/Mg–Zn) on the risk of wet dust collector under different environmental conditions, and a two-stage hydrogen evolution model was constructed. Secondly, from a technical point of view, a method of using environmentally-friendly, cost-effective sodium phosphate to inhibit the hydrogen evolution reaction of Mg alloys is also proposed. The morphologies of Mg alloy dust particles before and after reaction were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and chemical dynamics modeling before the related reaction mechanisms were identified. The research outcome of the present study could provide effective technical guidance for preventing hydrogen explosion accidents at Mg alloy fabrication facilities.
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