Effect of Nb on the Corrosion Resistance of Ni-Cr-Fe-Based Weld Metals

IMR OpenIR

	Effect of Nb on the Corrosion Resistance of Ni-Cr-Fe-Based Weld Metals
	Zhang, Xu; Li, Dianzhong; Li, Yiyi; Lu, Shanping; Lu, SP (reprint author), Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 72 Wenhua Rd, Shenyang 110016, Peoples R China.; Lu, SP (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
	2017-06-01
发表期刊	CORROSION
ISSN	0010-9312
卷号	73 期号:6 页码:734-741
摘要	The localized corrosion behaviors (intergranular corrosion, pitting, and interdendritic corrosion) of Ni-Cr-Fe-based weld metals with different niobium concentrations were investigated both in the as-welded and heat-treated conditions using the modified Huey test (ASTM A262-2010). Results indicated that Nb could reduce the intergranular corrosion susceptibility of Ni-Cr-Fe-based weld metals by preventing Cr carbides from precipitating at grain boundaries. However, the degree of pitting corrosion became more severe with the increase of Nb. The Laves phase could be corroded easily in the oxidizing environment, which increased the pitting corrosion sensitivity of weld metals. Interdendritic corrosion became the main corrosion type of weld metals that were heat treated at 620 degrees C for 29 h. The depletions of elements Cr and Ni occurred in the interdendritic region, which resulted in the interdendritic corrosion of the heat-treated weld metals. With increasing Nb, the degree of Cr and Ni depletions became higher and the interdendritic corrosion sensitivity of the heat-treated weld metals increased.; The localized corrosion behaviors (intergranular corrosion, pitting, and interdendritic corrosion) of Ni-Cr-Fe-based weld metals with different niobium concentrations were investigated both in the as-welded and heat-treated conditions using the modified Huey test (ASTM A262-2010). Results indicated that Nb could reduce the intergranular corrosion susceptibility of Ni-Cr-Fe-based weld metals by preventing Cr carbides from precipitating at grain boundaries. However, the degree of pitting corrosion became more severe with the increase of Nb. The Laves phase could be corroded easily in the oxidizing environment, which increased the pitting corrosion sensitivity of weld metals. Interdendritic corrosion became the main corrosion type of weld metals that were heat treated at 620 degrees C for 29 h. The depletions of elements Cr and Ni occurred in the interdendritic region, which resulted in the interdendritic corrosion of the heat-treated weld metals. With increasing Nb, the degree of Cr and Ni depletions became higher and the interdendritic corrosion sensitivity of the heat-treated weld metals increased.
部门归属	[zhang, xu ; li, yiyi ; lu, shanping] chinese acad sci, inst met res, key lab nucl mat & safety assessment, 72 wenhua rd, shenyang 110016, peoples r china ; [zhang, xu] univ sci & technol china, sch mat sci & engn, 72 wenhua rd, shenyang 110016, peoples r china ; [zhang, xu ; li, dianzhong ; li, yiyi ; lu, shanping] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Interdendritic Corrosion Modified Huey Test Nb Ni-cr-fe Alloy Pitting Weld
学科领域	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	Natural Science Foundation of China (NSFC) [51474203]; Chinese Academy of Sciences [KGZD-EW-XXX-2]
收录类别	SCI
语种	英语
WOS记录号	WOS:000403212000014
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78105
专题	中国科学院金属研究所
通讯作者	Lu, SP (reprint author), Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 72 Wenhua Rd, Shenyang 110016, Peoples R China.; Lu, SP (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Zhang, Xu,Li, Dianzhong,Li, Yiyi,et al. Effect of Nb on the Corrosion Resistance of Ni-Cr-Fe-Based Weld Metals[J]. CORROSION,2017,73(6):734-741.
APA	Zhang, Xu,Li, Dianzhong,Li, Yiyi,Lu, Shanping,Lu, SP ,&Lu, SP .(2017).Effect of Nb on the Corrosion Resistance of Ni-Cr-Fe-Based Weld Metals.CORROSION,73(6),734-741.
MLA	Zhang, Xu,et al."Effect of Nb on the Corrosion Resistance of Ni-Cr-Fe-Based Weld Metals".CORROSION 73.6(2017):734-741.