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| Failure Modes and Storage Performance of Weakly Sealed Pyrotechnics |
| Received:July 24, 2023 Revised:September 21, 2023 |
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| DOI：10.7643/issn.1672-9242.2023.10.015 |
| KeyWord:weakly sealed pyrotechnics accelerated life temperature temperature and humidity failure mode storage performance |
| Author | Institution |
| LI Fang |
National Key Laboratory of Applied Physics-Chemical, Shaanxi Applied Physics-chemistry Research Institute, Xi’an , China |
| ZHANG Peng-hui |
National Key Laboratory of Applied Physics-Chemical, Shaanxi Applied Physics-chemistry Research Institute, Xi’an , China |
| QU Ping |
National Key Laboratory of Applied Physics-Chemical, Shaanxi Applied Physics-chemistry Research Institute, Xi’an , China |
| HU Wei |
National Key Laboratory of Applied Physics-Chemical, Shaanxi Applied Physics-chemistry Research Institute, Xi’an , China |
| LIU Luo-yi |
School of Environment and Safety Engineering, North University of China, Taiyuan , China |
| XIE Ming-wei |
National Key Laboratory of Applied Physics-Chemical, Shaanxi Applied Physics-chemistry Research Institute, Xi’an , China |
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| Abstract: |
| The work aims to obtain the failure modes and storage performance of weakly sealed pyrotechnics under temperature and humidity environments. The accelerated life tests for two types of weakly sealed pyrotechnics under temperature and humidity environments were designed, and visual inspection, performance testing, and failure mode analysis were conducted on the pyrotechnics after accelerated storage. The main failure modes of damp proof paint sealed pyrotechnics such as ignition heads were prolonged action time and insufficient ignition ability. The main failure mechanisms were oxidation of pins, deliquescence of the agent, and oxidation of the reducing agent in the agent. The failure mode of silk pad and adhesive sealed pyrotechnics such as flame detonators, under temperature and humidity stress mainly resulted in a decrease in output capacity. The failure mechanism was mainly due to the chemical reaction of carboxylic lead with water. The storage characteristics of weakly sealed pyrotechnics are closely related to their own sealing and charging characteristics under temperature and humidity environments. Their failure rate depends on their own sealing and the hygroscopicity and stability of the main charging agent. |
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