Effects of Boron on Microstructure and Metastable Pitting Corrosion Behavior of Super304H Austenitic Stainless Steel

IMR OpenIR

	Effects of Boron on Microstructure and Metastable Pitting Corrosion Behavior of Super304H Austenitic Stainless Steel
	Bai, Guanshun; Lu, Shanping; Li, Dianzhong; Li, Yiyi; shplu@imr.ac.cn
	2015
发表期刊	JOURNAL OF THE ELECTROCHEMICAL SOCIETY
ISSN	0013-4651
卷号	162 期号:9 页码:C473-C481
摘要	The effects of boron on the microstructure and the pitting corrosion behavior, especially the metastable pitting, were investigated in Super304H austenitic stainless steels with 0-130 ppm boron solution treated at 1100 degrees C. The microstructures were analyzed using scanning electron microscopy, transmission electron microscopy with energy dispersive spectroscopy and secondary ion Mass spectroscopy. Meanwhile, the pitting corrosion behavior was evaluated by potentiodynamic and potentiostatic polarization tests in 3.5% NaCl solution at 25 degrees C. Microstructural characterizations showed that boron addition favored the precipitation of Cr-rich boride (M2B), which resulted in an asymmetric Cr-depleted zone around M2B and reduced the chromium content in the austenite matrix. The Cr-depleted zones could act as extra sites for pit initiation, along with the interfaces between the austenite matrix and non-metallic inclusions. The potentiodynamic polarization test results indicated that boron addition decreased the pitting potential. The potentiostatic test results revealed that boron addition promoted the initiation frequency and growth rate of metastable pits, and increased the probability of stable pitting. (C) 2015 The Electrochemical Society.
部门归属	[bai, guanshun ; lu, shanping ; li, dianzhong ; li, yiyi] chinese acad sci, inst met res, shenyang natl lab mat sci synl, shenyang 110016, peoples r china
资助者	national high technology research and development program of China [2012AA03A501]
收录类别	sci
语种	英语
WOS记录号	WOS:000359177100042
引用统计	被引频次：23[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/321006/74780
专题	中国科学院金属研究所
通讯作者	shplu@imr.ac.cn
推荐引用方式 GB/T 7714	Bai, Guanshun,Lu, Shanping,Li, Dianzhong,et al. Effects of Boron on Microstructure and Metastable Pitting Corrosion Behavior of Super304H Austenitic Stainless Steel[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2015,162(9):C473-C481.
APA	Bai, Guanshun,Lu, Shanping,Li, Dianzhong,Li, Yiyi,&shplu@imr.ac.cn.(2015).Effects of Boron on Microstructure and Metastable Pitting Corrosion Behavior of Super304H Austenitic Stainless Steel.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,162(9),C473-C481.
MLA	Bai, Guanshun,et al."Effects of Boron on Microstructure and Metastable Pitting Corrosion Behavior of Super304H Austenitic Stainless Steel".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 162.9(2015):C473-C481.