| Citation: | LI Jingyang, WANG Zhen, CHEN Yi, et al. Beijing-Tianjin-Hebei carbon steel soil corrosion rate map based on BP-GIS[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(6): 1151-1158. doi: 10.13700/j.bh.1001-5965.2019.0403(in Chinese)
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In view of the corrosion of carbon steel soil in Beijing-Tianjin-Hebei region, the prediction model for corrosion and pore corrosion in soil were developed using Back Propagation (BP) neural network. The main influencing factors were used as input parameters. According to the values of main soil corrosion influencing factors, the carbon steel soil corrosion rate was predicted. Average annual carbon steel soil corrosion rate in China was mapped based on Geographic Information System (GIS). The research shows that the average annual corrosion rate of carbon steel in Beijing-Tianjin-Hebei region is higher in the northwest and lower in the southeast in one year, and the average annual corrosion rate is basically uniformly distributed in many years. The carbon steel soil corrosion caused by pH value, total salt content, soil temperature, total nitrogen content and organic matter is more significant. The maximum average annual corrosion rate of carbon steel in 1, 3, 5 and 8 years is 6.159, 2.322, 2.614 and 3.467 g/(dm2·a).
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