城市燃气球墨铸铁埋地管道土壤腐蚀行为研究

doi:10.16265/j.cnki.issn1003-3033.2017.02.016

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (2): 86-91.doi: 10.16265/j.cnki.issn1003-3033.2017.02.016

城市燃气球墨铸铁埋地管道土壤腐蚀行为研究

刘爱华副教授, 张雅岚, 梁凤婷, 陈士强, 徐文彬教授

广东工业大学环境科学与工程学院,广东广州 510006

收稿日期:2016-10-20 修回日期:2016-12-24 出版日期:2017-02-28 发布日期:2020-11-22
通讯作者: 徐文彬(1968—),男,浙江台州人,博士,教授,主要从事安全评价、事故模拟和应急等方面的研究。E-mail: xuwenbin@tom.com。
作者简介:刘爱华 (1976—),女,湖南衡阳人,博士,副教授,主要从事城市生命线可靠性分析与风险评估、气体扩散规律等方面的教学和科研工作。E-mail: ah_liu@163.com。
基金资助:
国家自然科学基金资助(51508110);广东省自然科学基金资助(2016A030310341)。

Study on soil corrosion behavior of urban gas buried pipeline of ductile iron

LIU Aihua, ZHANG Yalan, LIANG Fengting, CHEN Shiqiang, XU Wenbin

School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou Guangdong 510006, China

Received:2016-10-20 Revised:2016-12-24 Online:2017-02-28 Published:2020-11-22

摘要/Abstract

摘要： 为解决城市燃气球墨铸铁埋地管道在土壤腐蚀作用下频繁失效的问题,开展土壤腐蚀模拟试验研究,首先,采用系统动力学流图和灰关联相结合的方法,确定土壤主要腐蚀因素。然后,以球墨铸铁标准腐蚀试片为材料,通过室内腐蚀模拟正交试验,得到试验区域土壤腐蚀因素的重要度排序,由大到小依次为含水量、孔隙率、含盐量、SO₄^2-含量、Cl^-含量、pH值。试验结果分析表明,含水量是影响试片腐蚀宏观形貌的主要因素。与碳钢材质的管道相比,球墨铸铁管道腐蚀受pH值的影响不显著,具有更好的耐酸腐蚀性。其他因素对两者的影响趋势较为一致。

关键词: 燃气管道, 球墨铸铁, 土壤腐蚀行为, 正交试验, 灰关联

Abstract: In order to solve the frequent failure problem of urban gas buried pipelines under the action of soil corrosion, soil corrosion simulation tests were carried out. Firstly, the main soil corrosion factors were identified by the combination method of the system dynamics flow diagram and the grey correlation. Then standard corrosion test slices of ductile iron were taken as the experimental material.Importance degrees of soil corrosion factors in the test area were obtained by orthogonal simulation experiments. The experimental results show that the water content is the main factor affecting the corrosion macroscopic feature of the specimen, and it is followed by the porosity ,salt content,sulphate radical cotent,chloridion content,and PH value,that except pH value, influences of the factors on ductile iron are similar to those on carbon steel,and that the influence of pH on ductile iron is not obvious, and ductile iron has better acid corrosion resistance than carbon steel.

Key words: gas pipeline, ductile iron, soil corrosion behavior, orthogonal experiment, grey correlation

中图分类号:

X913. 4
X53

刘爱华, 张雅岚, 梁凤婷, 陈士强, 徐文彬. 城市燃气球墨铸铁埋地管道土壤腐蚀行为研究[J]. 中国安全科学学报, 2017, 27(2): 86-91.

LIU Aihua, ZHANG Yalan, LIANG Fengting, CHEN Shiqiang, XU Wenbin. Study on soil corrosion behavior of urban gas buried pipeline of ductile iron[J]. China Safety Science Journal, 2017, 27(2): 86-91.

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城市燃气球墨铸铁埋地管道土壤腐蚀行为研究

Study on soil corrosion behavior of urban gas buried pipeline of ductile iron

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