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
	T. J. Pan; M. Al-Omary; C. L. Zeng; W. T. Wu; Y. Niu
	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.
部门归属	chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. univ sharjah, dept basic sci, sharjah, u arab emirates.;niu, y (reprint author), chinese acad sci, inst met res, state key lab corros & protect, wencui rd 62, shenyang 110016, peoples r china;yniu@imr.ac.cn
关键词	Fe-cr Steels Reducing Atmosphere Corrosion Hcl And H2s Effects High-temperature Corrosion Waste Incineration Environments Iron-chromium-alloys Hydrogen-chloride Gas-mixtures Oxidizing Atmospheres Oxygen Mixtures Cr Alloys Fe-cr Oxidation
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WOS记录号	WOS:000231793800008
引用统计	被引频次：2[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/321006/34994
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	T. J. Pan,M. Al-Omary,C. L. Zeng,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	T. J. Pan,M. Al-Omary,C. L. Zeng,W. T. Wu,&Y. Niu.(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	T. J. Pan,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.