Waste to Hydrogen: Elaboration of Hydroreactive Materials from Magnesium-Aluminum Scrap

Ball-milled hydroreactive powders of Mg-Al scrap with 20 wt.% additive (Wood’s alloy, KCl, and their mixture) no additives were manufactured. Their hydrogen yields reaction rates in a 3.5 NaCl aqueous solution at 15–35 °C compared. In the beginning reaction, samples KCl (20 wt.%) Wood’s alloy (10 provided highest second-highest rates, respectively. However, after 4 h correspondingly lowest second-lowest percentages—(45.6 ± 4.4)% (56.0 1.2)% 35 °C. At same temperature, demonstrated (73.5 10.0)% (70.6 2.5)%, correspondingly, while respective maximum second-lowest. The variations kinetics for can be explained by difference particle sizes (apparently affecting specific surface area), crystal lattice defects accumulated during ball milling, favoring pitting corrosion, morphology solid product covering particles, contradicting effects from potential formation reaction-enhancing microgalvanic cells intended to induce anodic dissolution Mg conductive media reaction-hindering crystal-grain-screening compounds metal components.