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| Effects of Salt Spray Environment on Stabilizing Property of Pyrotechnic Agents |
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| DOI：10.7643/issn.1672-9242.2022.12.007 |
| KeyWord:pyrotechnic agents salt spray environment microscopic morphology failure mechanism thermal analysis technology intrinsic stability |
| Author | Institution |
| YU Qian |
Beijing Institute of Technology, Beijing , China |
| HOU Jia-xing |
Beijing Institute of Technology, Beijing , China |
| LIU Jing-song |
Changchun Institute of Equipment and Process, Changchun , China |
| ZHANG Hong-guang |
Changchun Institute of Equipment and Process, Changchun , China |
| LIU Chuang |
Changchun Institute of Equipment and Process, Changchun , China |
| YANG Li |
Beijing Institute of Technology, Beijing , China |
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| Abstract: |
| The work aims to obtain the change rule on the properties of pyrotechnic agents under marine ecological environment, and conduct study about the stability test of pyrotechnic agents in salt spray environment to ensure the reliability of pyrotechnic agents. The microscopic morphology and composition changes of two typical primary explosives, lead azide (LA) and lead styphnate (LS) before and after the salt spray test were characterized by SEM imaging technology and X-ray diffraction technology. The failure mechanism of pyrotechnic agents under the effects of salt spray environment was studied from the perspective of thermal decomposition kinetics by DSC. Under the effects of salt spray environmental stress, the long columnar crystal structure of LA was embrittled and cracked into irregular small flaky crystals. Moreover, the thermal decomposition reaction peak of LA gradually moved forward with the increase of salt spray test time. After the test, the product component was Pb(OH)Cl, and its intrinsic stability decreased; Under the effects of salt spray environmental stress, its prismatic crystal structure was stratified into small flake crystal, and part of LS decomposed into Pb3(CO3)2(OH)2, resulting in a significant decrease on its intrinsic stability. Two typical pyrotechnic agents, LA and LS, are affected by the stress factors of the salt spray environment, and both will undergo failure decomposition reactions. Compared with LA, LS is more stable in the salt spray environment. |
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