Effect of Cl- Concentration on the Corrosion Behavior of 16Mn Steel in Saturated H2S/CO2 Solution

doi:10.1007/s11595-018-1954-1

	Effect of Cl- Concentration on the Corrosion Behavior of 16Mn Steel in Saturated H2S/CO2 Solution
	Song Wenming 1,2; Yang Guirong1 ; Liao Bingbing 1; Li Jian 3; Ma Ying1 ; Hao Yuan 1
	2018-10
发表期刊	JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
ISSN	1000-2413
卷号	33 期号:5 页码:1205-1215
摘要	The corrosion behavior of 16Mn steel was studied in saturated H2S or H2S/CO2 solutions containing different Cl- concentrations at 80 degrees C. The microstructure and chemical composition of the corrosion products were investigated through scanning electron microscopy, energy-dispersive X-ray spectroscopy, EPMA, and X-ray diffraction. Results showed that the corrosion rate decreased with increasing Cl- concentration in saturated H2S or H2S/CO2 solution at pH 4. Conversely, the corrosion rate increased with increasing Cl- concentration in saturated H2S solution at pH 6. The relative H+ concentration decreased because of the increase of Cl- concentration at pH 4, and Cl- acted as a catalyst in the corrosive medium at pH 6 because the net H+ concentration decreased obviously compared with the condition at pH4. Cl- promoted the formation of Fe-deficient iron sulfide at pH 4, and the opposite effect was observed in the nearly neutral solution. The corrosion rate increased firstly with increasing Cl- concentration and then decreased in the saturated H2S/CO2 solution at pH 6. The corrosion products were mainly composed of two kinds of iron sulfide. Sulfide FeS1-x was a kind of tetragonal crystal, whereas the other was the hexagonal/monoclinic iron sulfide Fe1-xS. The corrosion film that was mainly composed of FeS1-x did not confer a protective effect on the base metal. The atomic ratio of Fe/S was more than 1 for FeS1-x. The appearance of sulfide FeS1-x resembled a square block or small, needle-like, flocculent particles. The atomic ratio of Fe/S was less than 1 for Fe1-xS, and the corrosion film mainly composed of Fe1-xS conferred some protective property on the base metal. The sulfide FeS1-x exhibited a long claviform morphology with a hexagonal or quadrilateral cross-sectional shape.
关键词	16Mn steel acid corrosion weight loss microstructure corrosion products
DOI	10.1007/s11595-018-1954-1
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51765035]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000451778000028
出版者	JOURNAL WUHAN UNIV TECHNOLOGY
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/32418
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Yang Guirong
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Petr Machinery Inst, Lanzhou 730000, Gansu, Peoples R China 3.Wuhan Res Inst Mat Protect, Wuhan 430030, Hubei, Peoples R China
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	Song Wenming,Yang Guirong,Liao Bingbing,et al. Effect of Cl- Concentration on the Corrosion Behavior of 16Mn Steel in Saturated H2S/CO2 Solution[J]. JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION,2018,33(5):1205-1215.
APA	Song Wenming,Yang Guirong,Liao Bingbing,Li Jian,Ma Ying,&Hao Yuan.(2018).Effect of Cl- Concentration on the Corrosion Behavior of 16Mn Steel in Saturated H2S/CO2 Solution.JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION,33(5),1205-1215.
MLA	Song Wenming,et al."Effect of Cl- Concentration on the Corrosion Behavior of 16Mn Steel in Saturated H2S/CO2 Solution".JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION 33.5(2018):1205-1215.

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