燃油火场环境中助燃剂的快速检验方法研究

doi:10.11902/1005.4537.2016.154

中国腐蚀与防护学报

2017, Vol. 37

Issue (1): 74-80 DOI: 10.11902/1005.4537.2016.154

研究报告

本期目录 | 过刊浏览

燃油火场环境中助燃剂的快速检验方法研究

谢冬柏¹(

),单国²

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

Rapid Identification of Liquid Accelerant in Fire Scene Environment

Dongbai XIE¹(

),Guo SHAN²

1 Key Laboratory of Impression Evidence Examination and Identification Technology, National Police University of China, Shenyang 110854, China
2 Department of Forensic Science, Xinjiang Police College, Urumqi 830011, China

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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。

关键词 ：火场环境, 助燃剂, 检验, 金属, 高温氧化

Abstract：

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.

Key words： fire scene accelerant identification metallic material high temperature oxidation

收稿日期: 2016-09-10

基金资助:新疆高等学校重点项目(XJEDU2014I050)

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引用本文:

谢冬柏,单国. 燃油火场环境中助燃剂的快速检验方法研究[J]. 中国腐蚀与防护学报, 2017, 37(1): 74-80.
Dongbai XIE, Guo SHAN. Rapid Identification of Liquid Accelerant in Fire Scene Environment. Journal of Chinese Society for Corrosion and protection, 2017, 37(1): 74-80.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2016.154 或 https://www.jcscp.org/CN/Y2017/V37/I1/74

图1 模拟燃油火场实验用管式炉

表1 Q235钢及工业纯Cu的化学成分

图2 Cu在600 ℃空气和煤油燃烧环境中分别氧化30和60 min后的表面形貌

图3 Cu在700 ℃空气和煤油燃烧环境中分别氧化30和60 min后的表面形貌

图4 Cu在800 ℃空气和煤油燃烧气氛中氧化60 min后的表面形貌

图5 Q235钢在600 ℃空气和煤油燃烧环境中分别氧化30和60 min后的表面形貌

图6 Q235钢在700 ℃空气和煤油燃烧环境中分别氧化30和60 min后的表面形貌

图7 Q235钢在800 ℃空气和煤油燃烧环境中分别氧化30和60 min后的表面形貌

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