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Erosion–corrosion behavior of SAF3207 hyper-duplex stainless steel

  • Hong-liang XiangEmail author
  • Yu-rui Hu
  • Hua-tang CaoEmail author
  • Dong Liu
  • Xuan-pu Dong
Article
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Abstract

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 7wt% 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.

Keywords

hyper duplex stainless steel erosion corrosion flow velocity electrochemical corrosion microstructure morphology 

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Notes

Acknowledgments

This work was supported by the Major Special Program of Fujian Province, China (No. 2017HZ0001-2), the Joint Innovative Project for Industrial Technology of Fujian Province, China (No. FG-2016001), the Special Funds for Marine High-Tech Industry Development of the Fujian Province of China (High-Tech of Ocean and Fisheries of Fujian Province 2014 No. 14) and the Scientific Research Projects for Young Teachers of Education Department of Fujian Province, China (No. JAT160066).

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Copyright information

© University of Science and Technology Beijing and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Mechanical Engineering and AutomationFuzhou UniversityFuzhouChina
  2. 2.Jinjiang Science and Education ParkFuzhou UniversityJinjiangChina
  3. 3.Department of Advanced Production Engineering, Engineering and Technology Institute GroningenUniversity of GroningenNijenborgh 4The Netherlands
  4. 4.State Key Laboratory of Materials Processing and Die & Mould TechnologyHuazhong University of Science and TechnologyWuhanChina

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