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

被引：0
作者：
Junwei Fu
Jiangchun Wang
Feng Li
Kai Cui
Xiaodong Du
Yucheng Wu
机构：
[1] Hefei University of Technology,School of Materials Science and Engineering
[2] National-Local Joint Research Center of Non-Ferrous Metal Materials and Processing Technology,undefined
来源：
Applied Physics A | 2020年 / 126卷
关键词：
Stainless steel; Microstructure; Polarization; Pitting corrosion;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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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