Influence of microstructure and elemental partitioning on pitting corrosion resistance of duplex stainless steel welding joints

详细信息    查看全文

• 作者：Zhiqiang Zhang^a ; ^b ; Hongyang Jing^a ; ^b ; Lianyong Xu^a ; ^b ; ^{xulianyong@tju.edu.cn} ; Yongdian Han^a ; ^b ; Lei Zhao^a ; ^b ; Jianli Zhang^c
• 关键词：Duplex stainless steel ; Welding ; Microstructure ; Elemental partitioning ; Electron probe microanalysis ; Pitting corrosion
• 刊名：Applied Surface Science
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：394
• 期：Complete
• 页码：297-314
• 全文大小：16766 K
• 卷排序：394

文摘

N2-supplemented shielding gas promoted nitrogen solid-solution in the austenite. Secondary austenite had higher Ni but lower Cr and Mo than primary austenite. Pitting corrosion preferentially occurred at secondary austenite and Cr2N. Adding N2 in shielding gas improved pitting corrosion resistance of GTAW joint. E2209T1 weld metal had very poor pitting corrosion resistance due to inclusions.