Correlation between indoor and outdoor corrosion tests for coal train body steel in a coal medium environment
Jia-liang Song1,2, Jun-hang Chen1,2, Pan Yi3, Na-na Chen1,2, Zhao-liang Li1,2, Kui Xiao1,2
1 Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China 2 Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China 3 China Electric Power Research Institute, Beijing 100192, China
Correlation between indoor and outdoor corrosion tests for coal train body steel in a coal medium environment
Jia-liang Song1,2, Jun-hang Chen1,2, Pan Yi3, Na-na Chen1,2, Zhao-liang Li1,2, Kui Xiao1,2
1 Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China 2 Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China 3 China Electric Power Research Institute, Beijing 100192, China
摘要 Q345B carbon steel as well as Q450NQR1 and S500AW weathering steels were subjected to outdoor exposure corrosion tests in coal environments and indoor periodic immersion accelerated corrosion tests with a simulated coal leaching solution. The corrosion kinetics were studied by the weight loss method, and the corrosion morphology and corrosion product composition were observed and analyzed by scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffraction. Afterward, correlation analysis of the indoor and outdoor tests was carried out by the gray correlation analysis method. The results show that the relationship between the corrosion weight loss and corrosion time of the three steels conforms to follow the exponent power law. In particular, Q450NQR1 steel has the best corrosion resistance. The types of corrosion products and the distribution of elements in the rust layer of the three steels are similar in the indoor and outdoor tests. The gray correlation degrees of the three steels in the indoor and outdoor tests are all greater than 0.6; thus, the two corrosion tests have a good correlation. Based on this, the accelerated simulation test method of the coal leaching solution is determined, and life prediction models of three steels in coal leaching solution are established to simulate the corrosion of the bottom board and side board.
Abstract：Q345B carbon steel as well as Q450NQR1 and S500AW weathering steels were subjected to outdoor exposure corrosion tests in coal environments and indoor periodic immersion accelerated corrosion tests with a simulated coal leaching solution. The corrosion kinetics were studied by the weight loss method, and the corrosion morphology and corrosion product composition were observed and analyzed by scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffraction. Afterward, correlation analysis of the indoor and outdoor tests was carried out by the gray correlation analysis method. The results show that the relationship between the corrosion weight loss and corrosion time of the three steels conforms to follow the exponent power law. In particular, Q450NQR1 steel has the best corrosion resistance. The types of corrosion products and the distribution of elements in the rust layer of the three steels are similar in the indoor and outdoor tests. The gray correlation degrees of the three steels in the indoor and outdoor tests are all greater than 0.6; thus, the two corrosion tests have a good correlation. Based on this, the accelerated simulation test method of the coal leaching solution is determined, and life prediction models of three steels in coal leaching solution are established to simulate the corrosion of the bottom board and side board.
Jia-liang Song,Jun-hang Chen,Pan Yi, et al. Correlation between indoor and outdoor corrosion tests for coal train body steel in a coal medium environment[J]. Journal of Iron and Steel Research International, 2022, 29(09): 1495-1504.
2022, Vol. 29 
