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| Influence of Pyrolysis Products of Polyvinyl Chloride on Oxidation Behavior of Cu in Ethanol Combustion Atmosphere |
TANG Zhijie1,2, XIE Dongbai2( ), DUO Shuwang1, LAI Tian1, HONG Hao3, SHAN Guo4 |
1.Jiangxi Province Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, China
2.University Featured Laboratory of Materials Engineering for Agricultural Machinery of Shandong Province, Weifang University of Science and Technology, Shouguang 262700, China
3.School of Mechanical and Electrical Engineering, Xinyu University, Xinyu 338004, China
4.Department of Forensic Science, Xinjiang Police College, Urumqi 830011, China |
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Cite this article:
TANG Zhijie, XIE Dongbai, DUO Shuwang, LAI Tian, HONG Hao, SHAN Guo. Influence of Pyrolysis Products of Polyvinyl Chloride on Oxidation Behavior of Cu in Ethanol Combustion Atmosphere. Journal of Chinese Society for Corrosion and protection, 2026, 46(4): 1289-1295.
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Abstract In order to gain an in-depth understanding of the oxidation behavior of metallic materials in a fire environment, herein, the influence of pyrolysis products of polyvinyl chloride on the oxidation characteristics of Cu in an ethanol combustion atmosphere was assessed via a home-made fire atmosphere simulation device. Then the microstructure, elemental composition and phase constituents of the oxidation products were examined by means of atomic force microscopy (AFM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS), while the composition of the combustion atmosphere was analyzed using gas chromatography (GC). The results demonstrate that the decomposition of PVC produces HCl, which reacts with Cu to form CuCl. Owing to the enhanced volatility of CuCl with the increasing temperature, causes the oxide layer to become loose and porous which leads to accelerated oxidation of the inner Cu substrate. Moreover, the hydrogen generated via the thermal decomposition of PVC induces hydrogen embrittlement of the oxide scale and can reduce part of the CuO to Cu2O, further compromises the protective capability of the oxide scale. These observed oxidation characteristics provide a very meaningful reference for the further fire investigations.
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Received: 14 August 2025
32134.14.1005.4537.2025.259
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| Fund: National Natural Science Foundation of China(52462041) |
Corresponding Authors:
XIE Dongbai, Tel: 18160561996; E-mail: dbxie@aliyun.com
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