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| Atmospheric Environment Corrosion Evaluation of Typical Industrial Coastal Areas |
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| DOI：10.7643/issn.1672-9242.2023.06.021 |
| KeyWord:Q235 steel L415 steel 16MnNiVR steel industrial coastal atmospheric environment corrosion rating |
| Author | Institution |
| PENG Yun-chao |
Pipe China Network Corporation Eastern Oil Storage and Transportation Co., Ltd., Jiangsu Xuzhou , China |
| MA Kai-jun |
Pipe China Network Corporation Eastern Oil Storage and Transportation Co., Ltd., Jiangsu Xuzhou , China |
| CAO Gong-wang |
Institute of Metal Research, Chinese Academy of Sciences, Shenyang , China |
| WANG Zhen-yao |
Institute of Metal Research, Chinese Academy of Sciences, Shenyang , China |
| LI Xiao-han |
Institute of Metal Research, Chinese Academy of Sciences, Shenyang , China |
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| Abstract: |
| The work aims to evaluate the environment corrosion of different atmospheric environments in industrial coastal areas with active metal materials, study the difference of corrosion behavior of different metal materials, and discuss the selection of corrosion resistance of metal materials in the industrial coastal atmospheric environment. Under different atmospheric conditions, Q235, 16MnNi and L415 were selected to develop outdoor exposure test for one year, and the corrosion mechanism of metal substrate was studied by means of weight loss analysis and scanning electron microscope to evaluate the corrosion of atmospheric environment. The corrosion behavior of Q235, 16MnNi and L415 steels in the coastal industrial atmospheric environment in different regions was greatly affected by the atmospheric corrosion environment. The corrosion products contained a certain amount of Cl and S. The special structure of the rust layer on the surface of the same metal material made its substrate come into contact with the corrosion factors in the atmospheric environment, which lead to different corrosion behaviors of metal materials in different atmospheric corrosion environments. In the atmospheric environment of industrial coastal areas, the difference in atmospheric corrosion is caused by the acid cycle corrosion mechanism. At the initial stage of corrosion, the corrosion of the three kinds of steel was aggravated due to the porous structure of the rust layer and the formation of soluble corrosion products. The atmospheric corrosion grade of Huangdao area, Caofeidian area, Lanshan area and Zhanjiang are is C2, C3, C2 and C3 respectively. |
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