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Investigation of Weld Corrosion Effects on the Stress Behavior of a Welded Joint Pipe Using Numerical Simulations

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Abstract

In this paper, the influence of weld corrosion on the mechanical behavior of a welded joint pipeline was investigated using corrosion and mechanical simulations simultaneously. In the corrosion simulation, the modeling results (i.e., the corrosion potential and current density) revealed that the welded joint is preferentially corroded and the corrosion rate is higher in the outside environment due to the severe corrosion factors. The increase in corrosion degradation according to the operation time increases the stress concentration on the welded joint, indicating that the failure risk of the welded joint is increased with increasing corrosion degradation. These results can be used to evaluate the lifetime of welded joints exposed to corrosion and suggest guidelines for the maintenance of structures.

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Acknowledgements

This research was supported by the Korea District Heating Corporation (No. 0000000014524).

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Authors and Affiliations

  1. Department of Mechanical and Materials Engineering, Korea Institute of Nuclear Safety, Daejeon, 34142, Republic of Korea

    Yong-Sang Kim

  2. School of Advanced Materials Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea

    Jung-Gu Kim

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  1. Yong-Sang Kim
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Correspondence to Jung-Gu Kim.

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Kim, YS., Kim, JG. Investigation of Weld Corrosion Effects on the Stress Behavior of a Welded Joint Pipe Using Numerical Simulations. Met. Mater. Int. 25, 918–929 (2019). https://doi.org/10.1007/s12540-019-00260-z

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  • DOI: https://doi.org/10.1007/s12540-019-00260-z

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