秦京线输油管道土壤腐蚀的模糊综合评判

The Fuzzy Comprehensive Evaluation of Soil Corrosion of Qin-Jing Oil Transportation Pipeline

在分析土壤的理化性质对管材腐蚀影响基础上,确定了土壤理化性质对管材腐蚀的分级标准。建立了土壤理化性质对管材腐蚀性的隶属函数,确定了管道土壤腐蚀的模糊综合评判数学模型。最后,对秦京线输油管道的土壤腐蚀,进行了模糊综合评判。得出,秦京线土壤腐蚀较严重区域在秦皇岛输油站、昌黎输油站附近和迁安输油站出口处附近,处于"强腐蚀"和"较强腐蚀"范围内,影响秦京线土壤腐蚀主要因素是土壤含水率、含盐量和电阻率,其中以含水率的影响最大。

Based on the analysis of the influence of soil physics and chemistry properties on the pipeline material corrosion, the corrosion graduation standards of soil are established. The membership functions and the mathematics model of fuzzy comprehensive evaluation of soil corrosion to pipeline are given. At the end, the soil corrosion of Qin--Jing oil transportation pipeline is evaluated by the fuzzy comprehensive evaluation method. It is concluded that the most serious soil corrosive areas of Qin--Jing oil transportation pipeline are near Qin--Hauangdao and Chang--li and Qian-an oil transportation stations. In those areas, the soil corrosion to pipeline is the ＇most serious corrosion＇ or ＇more serious corrosion＇. The water content and salinity and resistivity of soil are main elements which lead to pipe corrosion, especially the water content of the soil.