The corrosion of three commercial steels in reducing atmospheres containing HCl and H2S at 873 K

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	The corrosion of three commercial steels in reducing atmospheres containing HCl and H2S at 873 K
	Pan, TJ ; Al-Omary, M ; Zeng, CL ; Wu, WT ; Niu, Y
通讯作者	Niu, Y()
	2005
发表期刊	HIGH TEMPERATURE MATERIALS AND PROCESSES
ISSN	0334-6455
卷号	24 期号:3 页码:193-203
摘要	The behavior of three commercial steels with different Cr contents (NF616, 12CrMoV and SS304) at 873K in a gas mixture of (vol.%) 2 H-2, 0.5 HCl, 0.005 H2S, balance CO2, providing partial pressures of 3.7x10(-22) 22 atm O-2, 3.9x10(-9) atm S-2 and 2.4x 10(-14) atm Cl-2, has been studied to examine the effect of a minor addition of H2S to a reducing HCl-containing atmosphere on the corrosion of the same materials, studied previously under similar test conditions in the absence of H2S. The presence of sulfur accelerated the corrosion of the two steels with lower chromium contents, but had no effect on the corrosion of SS304. Both NF616 and 12CrMoV formed duplex external scales plus a zone of internal attack rich in oxygen and chromium with little sulfur (up to 2 at.%). Little or no chlorine could be detected in the internal attack zone and in the scale. In general, the scales formed on these two steels in the present atmosphere were quite porous with respect to those corroded in the H2S-free atmosphere. Conversely, the stainless steel SS304 corroded much more slowly, forming a protective chromia scale as in the H2S-free atmosphere. Thus, the beneficial effect of chromium on the corrosion resistance of the steels in this atmosphere is only effective at large Cr contents. The mechanism of "active oxidation", based on the formation, diffusion and re-oxidation of volatile chlorides of both iron and chromium, has been adopted to interpret the results obtained.
关键词	Fe-Cr steels reducing atmosphere corrosion HCl and H2S effects
收录类别	SCI
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000231793800008
出版者	FREUND PUBLISHING HOUSE LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/82958
通讯作者	Niu, Y
作者单位	1.Univ Sharjah, Dept Basic Sci, Sharjah, U Arab Emirates 2.Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Pan, TJ,Al-Omary, M,Zeng, CL,et al. The corrosion of three commercial steels in reducing atmospheres containing HCl and H2S at 873 K[J]. HIGH TEMPERATURE MATERIALS AND PROCESSES,2005,24(3):193-203.
APA	Pan, TJ,Al-Omary, M,Zeng, CL,Wu, WT,&Niu, Y.(2005).The corrosion of three commercial steels in reducing atmospheres containing HCl and H2S at 873 K.HIGH TEMPERATURE MATERIALS AND PROCESSES,24(3),193-203.
MLA	Pan, TJ,et al."The corrosion of three commercial steels in reducing atmospheres containing HCl and H2S at 873 K".HIGH TEMPERATURE MATERIALS AND PROCESSES 24.3(2005):193-203.