Volume 71, Issue 10 pp. 1637-1650
ARTICLE

Investigation of corrosion behavior at elbow by array electrode and computational fluid dynamics simulation

Xiaodong Si

Xiaodong Si

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, Jiangsu, China

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Hongtao Si

Hongtao Si

Wansheng Mining of Chongqing Conservation and Repair of Ecological Environment Observation and Research Station, Chongqing Institute of Geology and Mineral Resources, Chongqing, China

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Manyi Li

Manyi Li

Wansheng Mining of Chongqing Conservation and Repair of Ecological Environment Observation and Research Station, Chongqing Institute of Geology and Mineral Resources, Chongqing, China

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Rui Zhang

Rui Zhang

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, Jiangsu, China

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Keyi Zhou

Corresponding Author

Keyi Zhou

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, Jiangsu, China

Correspondence Keyi Zhou, Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096 Jiangsu, China.

Email: [email protected]

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First published: 14 April 2020
Citations: 4

Abstract

The present study focuses on the flow-accelerated corrosion (FAC) behavior of A106Gr.B steel at 90° elbow by electrochemical measurement and computational fluid dynamics (CFD) simulation. The FAC rates under turbulent flows with a velocity of 3 and 1.5 m/s were measured by an array electrode technique in a loop system. The experimental results reveal that the maximum FAC rate appears at the extrados of 90° elbow, consistent with the locations from the rupture of the carbon steel piping in the worst cases at elbows. In addition, an effective mass transfer coefficient in consideration of the geometric factor was used to evaluate the FAC rate at intrados and extrados of the 90° elbow by CFD simulation. The predicted results are in good agreement with the experimental values.

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