MECHANICAL SIMULATION AND ELECTROCHEMICAL CORROSION IN A BURIED PIPELINE WITH CORROSION DEFECTS SITUATED IN PERMAFROST REGIONS

Xiaoli Li, Li Chen, Xiaoyan Liu, Yu Zhang and Lifu Cui
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Xiaoli Li: Department of Civil Engineering, Northeast Petroleum University, Daqing 163318, P. R. China†Hei-longjiang Key Laboratory of Disaster Prevention and Reduction and Protective Engineering, Daqing 163318, P. R. China
Li Chen: Department of Civil Engineering, Northeast Petroleum University, Daqing 163318, P. R. China
Xiaoyan Liu: Department of Civil Engineering, Northeast Petroleum University, Daqing 163318, P. R. China†Hei-longjiang Key Laboratory of Disaster Prevention and Reduction and Protective Engineering, Daqing 163318, P. R. China
Yu Zhang: Department of Civil Engineering, Northeast Petroleum University, Daqing 163318, P. R. China†Hei-longjiang Key Laboratory of Disaster Prevention and Reduction and Protective Engineering, Daqing 163318, P. R. China
Lifu Cui: #x2021;School of Civil Engineering, Dalian Nationalities University, Dalian 116600, P. R. China

Surface Review and Letters (SRL), 2021, vol. 28, issue 03, 1-12

Abstract: The geological environment along a buried pipeline in permafrost regions is complex, where differential frost heave often occurs. To understand the changes in the stress behavior of pipeline structures caused by corrosion while laying them in permafrost regions, we established a thermo-mechanical coupling model of buried pipeline with corrosion defects by using finite element software. Numerical simulation analysis of buried pipeline was conducted. The effects of the frost heave length, the length of the transition section, the corrosion depth, and the corrosion length on the stress displacement were obtained. These analyses showed that the stresses and displacements of the pipeline with corrosion defects in permafrost regions can be simulated by using the finite element software numerical simulation method. Afterward, the corrosion resistances of pipelines with different corrosion lengths and depths were investigated via an electrochemical testing method. These results can provide some useful insights into the possible mechanical state of buried pipeline with regard to their design and construction, as well as some useful theoretical references for simulating real-time monitoring and safety analysis for their operation in permafrost regions.

Keywords: Buried pipeline; corrosion; thermal-mechanical coupling; stress displacement; frost heave (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X21500025

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