Flow-accelerated corrosion behavior of 13Cr stainless steel in a wet gas environment containing CO2
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第7期
论文作者：Yong Li Min-dong Chen Jian-kuan Li Long-fei Song Xin Zhang Zhi-yong Liu
文章页码：779 - 787
摘 要：This work investigated the flow-accelerated corrosion（FAC） behavior of 13 Cr 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 13 Cr 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.
Yong Li1，Min-dong Chen1，Jian-kuan Li1，Long-fei Song1，Xin Zhang2，Zhi-yong Liu1
1. Corrosion and Protection Centre, Key Laboratory for Corrosion and Protection (MOE) National Environmental Corrosion Platform (NECP), University of Science and Technology Beijing2. Nuclear and Radiation Safety Center, Ministry of Environmental Protection of P.R. China
摘 要：This work investigated the flow-accelerated corrosion（FAC） behavior of 13 Cr 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 13 Cr 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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