Abstract
Magnesium alloy waste dust particles will be generated during alloy grinding, which undergoes a hydrogen production reaction in wet dust removal systems and introduces the risk of hydrogen explosion. To inhibit the generation of hydrogen, environmental friendly sodium alginate (SA) and sodium phosphate (SP) are combined to inhibit the hydrogen evolution reaction of waste magnesium alloy dust and water. The results of the hydrogen evolution experiment and chemical kinetics show that the combined action of 3 g/L sodium alginate and 2 g/L sodium phosphate can completely inhibit the hydrogen evolution reaction of magnesium alloy waste dust. The SEM, EDS, FTIR spectroscopy, XRD and adsorption theory results show that a compact and smooth protective film with sodium alginate as the main body and sodium phosphate as the supplement is formed on the surface of the ZK61 magnesium alloy, blocking the reaction pathway between the external water molecules and Mg2+. This research fills the gap of hydrogen evolution inhibitors for wet dust collectors used in magnesium alloy grinding enterprises and provides a novel, safe and effective method for clean and sustainable production of dust removal system.
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