Erosion–corrosion behavior of SAF3207 hyper-duplex stainless steel
来源期刊：International Journal of Minerals Metallurgy and Materials2019年第11期
论文作者：Hong-liang Xiang Yu-rui Hu Hua-tang Cao Dong Liu Xuan-pu Dong
文章页码：1415 - 1426
摘 要：Polarization curves and mass losses of SAF3207 hyper-duplex stainless steel under various conditions were measured. The damaged surfaces after erosion–corrosion tests were characterized by scanning electron microscopy. The results showed that an increase in flow velocity could enhance the electrochemical corrosion and consequently decrease the passivation properties of the steel. The erosion–corrosion damage of the samples increased substantially when the flow velocity exceeded the critical value of 4 m·s-1. The mass loss rate increased as the sand content increased, reaching a maximum at 7 wt% sand content, corresponding to the most severe electrochemical corrosion damage. When the sand content was increased further, however, the mass loss rate decreased and then tended stable. The mass loss was divided into incubation, sustained, and stationary periods, with a maximum mass loss rate of 12.97 g·h-1·m-2 after an erosion period of 2.5 h. The erosion–corrosion mechanism was investigated in detail.
Hong-liang Xiang1,2，Yu-rui Hu1，Hua-tang Cao3，Dong Liu1，Xuan-pu Dong4
1. School of Mechanical Engineering and Automation, Fuzhou University2. Jinjiang Science and Education Park, Fuzhou University3. Department of Advanced Production Engineering, Engineering and Technology Institute Groningen, University of Groningen4. State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology
摘 要：Polarization curves and mass losses of SAF3207 hyper-duplex stainless steel under various conditions were measured. The damaged surfaces after erosion–corrosion tests were characterized by scanning electron microscopy. The results showed that an increase in flow velocity could enhance the electrochemical corrosion and consequently decrease the passivation properties of the steel. The erosion–corrosion damage of the samples increased substantially when the flow velocity exceeded the critical value of 4 m·s-1. The mass loss rate increased as the sand content increased, reaching a maximum at 7 wt% sand content, corresponding to the most severe electrochemical corrosion damage. When the sand content was increased further, however, the mass loss rate decreased and then tended stable. The mass loss was divided into incubation, sustained, and stationary periods, with a maximum mass loss rate of 12.97 g·h-1·m-2 after an erosion period of 2.5 h. The erosion–corrosion mechanism was investigated in detail.
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