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Effect of Nb addition on the microstructure and corrosion resistance of ferritic stainless steel

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Abstract

The effects of Nb addition on the microstructure and corrosion resistance of the as-rolled Ti-stabilized Fe-17Cr ferritic stainless steels were investigated by optical microscopy, scanning electron microscopy, X-ray diffraction, pitting tests, and electrochemical measurements. TiN precipitate tends to form in the microstructure of Ti-stabilized Fe-17Cr ferritic stainless steel. After 0.1 wt. % Nb addition, (Ti, Nb) (C, N) composite precipitates with MgO and Al2O3 core form in the microstructure. After adding 0.1 wt. % Nb, the corrosion rate of the Ti-stabilized Fe-17Cr ferritic stainless steel in FeCl3 solution is decreased significantly. The corrosion current densities decrease in HNO3, NaOH, and NaCl solutions, and the pitting corrosion potentials can be improved in NaCl solution for the Fe-17Cr ferritic stainless steel with 0.1 wt. % Nb addition.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51571081).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China

    Junwei Fu, Jiangchun Wang, Feng Li, Kai Cui, Xiaodong Du & Yucheng Wu

  2. National-Local Joint Research Center of Non-Ferrous Metal Materials and Processing Technology, Hefei, 230009, China

    Yucheng Wu

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  1. Junwei Fu
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Correspondence to Junwei Fu.

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Fu, J., Wang, J., Li, F. et al. Effect of Nb addition on the microstructure and corrosion resistance of ferritic stainless steel. Appl. Phys. A 126, 194 (2020). https://doi.org/10.1007/s00339-020-3383-1

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