Xu Haishun, Mu Jie
College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China.
Zhejiang Academy of Emergency Management Science, Hangzhou 310012, China.
ACS Omega. 2025 Feb 12;10(7):6643-6649. doi: 10.1021/acsomega.4c07979. eCollection 2025 Feb 25.
This study investigates the effects of modified formulations (particle size, aluminum flake addition) and inerting measures (oxygen reduction) on the explosion propagation of coating powder by using visual experiments. We found a direct correlation between reduced particle size, the addition of aluminum flakes, and increased explosion risk. While reducing the oxygen content effectively slows flame propagation and combustion rate, its influence is modulated by particle size and composition. Notably, smaller particles exhibit slower flame propagation under low-oxygen conditions. The addition of aluminum flakes accelerates combustion, requiring a lower oxygen content for effective inerting. Our comprehensive evaluation of combustion rates suggests an oxygen concentration below 15% for optimal inerting.
本研究通过视觉实验研究了改性配方（粒径、添加铝片）和惰化措施（降低氧气含量）对涂料粉末爆炸传播的影响。我们发现粒径减小、添加铝片与爆炸风险增加之间存在直接关联。虽然降低氧气含量能有效减缓火焰传播和燃烧速度，但其影响会受到粒径和成分的调节。值得注意的是，较小的颗粒在低氧条件下火焰传播较慢。添加铝片会加速燃烧，需要较低的氧气含量才能有效惰化。我们对燃烧速度的综合评估表明，氧气浓度低于15%时惰化效果最佳。
