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

doi:10.16265/j.cnki.issn1003-3033.2017.02.016

Abstract

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

CLC Number:

X913. 4
X53

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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