Abstract
This work investigated the flow-accelerated corrosion (FAC) behavior of 13Cr in a wet CO2-containing environment at different flowing gas velocities and impinging angles, with the natural-gas pipeline environment simulated by a self-assembled impingement jet system. Surface morphology determination, electrochemical measurements, and hydromechanics numerical analysis were carried out to study the FAC behavior. The results demonstrate that pitting corrosion was the primary mode of corrosion in 13Cr stainless steel. High-flow-rate gas destroyed the passive film and decreased the pitting potential, resulting in more serious corrosion. The corrosion degree with various impact angles showed the following order: 90° > 60° > 45°. The shear force and the electrolyte from the flowing gas were concluded to be the determinant factors of FAC, whereas the shear force was the main factor responsible for destroying the passive film.
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Acknowledgements
This study was supported by the National Environmental Corrosion Platform (NECP), the National Key Technology R&D Program of China (No. 2011BAK06B01-01-02) and the Fundamental Research Funds for the Central Universities of china (No. FRF-BR-17-028A).
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Li, Y., Chen, Md., Li, Jk. et al. Flow-accelerated corrosion behavior of 13Cr stainless steel in a wet gas environment containing CO2. Int J Miner Metall Mater 25, 779–787 (2018). https://doi.org/10.1007/s12613-018-1626-3
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DOI: https://doi.org/10.1007/s12613-018-1626-3