燃油火场环境中助燃剂的快速检验方法研究  

Rapid Identification of Liquid Accelerant in Fire Scene Environment

作　　者：谢冬柏[1] 单国[2] 

机构地区：[1]中国刑事警察学院痕迹检验鉴定技术公安部重点实验室,沈阳110854 [2]新疆警察学院刑事科学技术系,乌鲁木齐830011

出　　处：《中国腐蚀与防护学报》2017年第1期74-80,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：新疆高等学校重点项目(XJEDU2014I050)~~

摘　　要：使用火场环境模拟设备对工业纯Cu及Q235钢在600,700及800℃条件下的火场燃烧环境进行暴露,通过光学显微镜对其表面的氧化物层进行观察,重点分析表面氧化层剥落特点及其原因。结果表明:与相同温度空气中暴露相比,火场燃烧环境进行暴露后两种金属材料表面的氧化物层厚度成倍增加,冷却至室温后为层状,而且有大量的开裂区域存在;工业纯Cu在煤油气氛环境中的氧化性能变化更为明显,表面氧化膜的粘附性严重蜕化,在整个实验过程中均发生明显的剥落;Q235钢在高温煤油燃烧环境气氛中生成的氧化物层粘附性和表面颜色显著不同,这与其所处环境中的气体成分密切相关。以上研究结果可为火灾现场的温度、燃烧时间及是否有助燃剂的加入提供初步的判断依据。Oxidation tests of Cu and Q235 steel were conducted in air alone and a combustion atmosphere of kerosene-air mixture at 600, 700 and 800 ℃ respectively, the later aims to simulate the fire scene environment with the presence of fuel accelerant. Cracking and spallation of the formed oxide scales were observed by using optical microscopy. The results revealed that the existence of kerosene accelerated the oxidation of Cu and Q235, and changed the surface morphologies of the oxide scales. With the increasing temperature and time, serious spallation of the oxide scales was observed. Especially, due to the spallation of the oxide scale formed on Cu, the mass loss of Cu did occurr. Based on the features of the oxide scales formed on Cu and Q235, it is expected to offer complementary insight on determining the fire characteristics, such as exposure temperature, time period and whether liquid accelerant is involved.

关 键 词：火场环境 助燃剂 检验 金属 高温氧化 

分 类 号：TG172[金属学及工艺—金属表面处理]