Research progress on CO2 corrosion mechanism and prediction model of natural gas pipelines

被引:0
|
作者
Xie F. [1 ,2 ]
Li J. [1 ,2 ]
Wang X. [3 ]
Ma C. [4 ]
Su Y. [1 ,2 ]
Sun X. [1 ,2 ]
机构
[1] College of Petroleum and Natural Gas Engineering, Liaoning Petrochemical University, Fushun
[2] Liaoning Key Laboratory of Oil & Gas Storage and Transportation Technology, Fushun
[3] PipeChina Eastern Crude Oil Storage and Transportation Co., Xuzhou
[4] Offshore Oil Engineering Co., Ltd., Tianjin
关键词
CO[!sub]2[!/sub] corrosion; Corrosion mechanism; Corrosion product film; Corrosion rate prediction; Empirical model; Mechanistic model; Natural gas pipeline; Semi-empirical model;
D O I
10.3787/j.issn.1000-0976.2021.10.012
中图分类号
学科分类号
摘要
The CO2 corrosion mechanism from three aspects of homogeneous chemical reaction, electrochemical reaction, and mass transfer process was investigated along with the key factors influencing CO2 corrosion. The latest progress of the corresponding CO2 corrosion rate prediction model is discussed. Based on the latest understanding on CO2 corrosion mechanism, various models were compared in terms of mechanism and expandability. The current research studied on CO2 corrosion mechanism are mainly based on an ideal solution environment system, and in the future, it is necessary to study the CO2 corrosion mechanism of a non-ideal solution system. The reaction mechanism of CO2 corrosion has not been figured out, and whether CO2 could directly participate in the anodic reaction and H2CO3 can be directly reduced is still controversial, which needs further studying. The current corrosion rate prediction model only considers electrochemical corrosion factors, but does not consider the influence of complex flow in pipelines, so it is necessary to establish a prediction model which can reflect the actual working conditions of pipelines more accurately.
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页码:109 / 118
页数:9
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