Research on the Inhibition Effect of NaCl on the Explosion of Mg–Al Alloy Powder,ACS Omega

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Research on the Inhibition Effect of NaCl on the Explosion of Mg–Al Alloy Powder
ACS Omega ( IF 3.7 ) Pub Date : 2024-02-07 , DOI: 10.1021/acsomega.3c08242
Xinxin Qin ₁ , Xiangrui Wei ₁ , Jing Shi ₁ , Yanling Yan ₁ , Yansong Zhang ₁

Affiliation

A study was conducted on the explosion overpressure and flame propagation law of magnesium–aluminum (Mg–Al) alloy powder, and the suppression mechanism of sodium chloride (NaCl) on the explosion of magnesium–aluminum alloy powder was explored. Adding NaCl powder can effectively reduce the explosion pressure, flame front position, and flame propagation speed. The higher the amount of NaCl powder added, the lower the explosion pressure of magnesium–aluminum alloy powder, the slower the flame propagation speed, and the lower the flame brightness. NaCl adsorbed on Mg–Al alloy powder isolated heat transfer and played a cooling role. The Cl^– produced by NaCl decomposition will react with the free radicals H⁺ and OH^– in the reaction system, which will reduce the concentration of H⁺ and OH^– in the combustion process and hinder the propagation and expansion of the flame. The research results provide theoretical guidance for the explosion prevention of Mg–Al alloy powder and the preparation of a physical–chemical compound explosion suppressor in the later stage.

中文翻译：

氯化钠对镁铝合金粉末爆炸抑制作用的研究

对镁铝合金粉末的爆炸超压和火焰传播规律进行了研究，探讨了氯化钠（NaCl）对镁铝合金粉末爆炸的抑制机理。添加NaCl粉末可以有效降低爆炸压力、火焰前锋位置和火焰传播速度。 NaCl粉末添加量越高，镁铝合金粉末的爆炸压力越低，火焰传播速度越慢，火焰亮度越低。 Mg-Al合金粉末上吸附的NaCl隔绝了传热并起到冷却作用。 NaCl分解产生的Cl ^-会与反应体系中的自由基H ⁺和OH ^-发生反应，使燃烧过程中H ⁺和OH ^-的浓度降低，阻碍火焰的传播和膨胀。研究成果为镁铝合金粉末的防爆及后期物理化学复合抑爆剂的制备提供了理论指导。

更新日期：2024-02-07

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