Hot Corrosion Behavior of SiO2-Al2O3-Glass Composite Coating on Ti-47Al-2Cr-2Nb Alloy: Diffusion Barrier for S and Cl

doi:10.1007/s40195-018-0842-1

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	Hot Corrosion Behavior of SiO2-Al2O3-Glass Composite Coating on Ti-47Al-2Cr-2Nb Alloy: Diffusion Barrier for S and Cl
	Li, Wen-Bo 1; Liu, Lan-Lan 1; Yang, Ying-Fei 2; Zhu, Sheng-Long 3; Wang, Fu-Hui 3
刊名	ACTA METALLURGICA SINICA-ENGLISH LETTERS
	2019-05-01
卷号	32 期号:5 页码:599-606
关键词	Corrosion Composite coating Ti-47Al-2Cr-2Nb alloy Diffusion
ISSN号	1006-7191
DOI	10.1007/s40195-018-0842-1
通讯作者	Yang, Ying-Fei(yfyang@jnu.edu.cn)
英文摘要	Type I hot corrosion behavior of SiO2-Al2O3-glass composite coating based on Ti-47Al-2Cr-2Nb substrate was investigated in the mixture salt of 25wt%NaCl+75wt%Na2SO4 at 850 degrees C. The results showed that there was a bidirectional ion exchange between composite coating and the film of mixed salts, and the sodium ion in the molten salts penetrated into the glass matrix of composite coating, while the potassium ion in the glass matrix dissolved into the molten salts. A decrease in hot corrosion rate was achieved for the coated alloy in comparison with the bared substrate due to the composite coating acting as a diffusion barrier to sulfur and chlorine and preventing the molten salts from diffusing to the coating/alloy interface during the hot corrosion exposure. Additionally, the composite coating decreased the oxygen partial pressure at the coating/alloy interface and promoted the selective oxidation of Al to form a protective Al2O3 layer.
资助项目	National Natural Science Foundation of China[51201171] ; National High Technology Research and Development Program of China (863 Program)[2012AA03A512]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	CHINESE ACAD SCIENCES, INST METAL RESEARCH
WOS记录号	WOS:000463780700007
资助机构	National Natural Science Foundation of China ; National High Technology Research and Development Program of China (863 Program)
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/132944]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yang, Ying-Fei
作者单位	1.Hunan Elect Power Co Ltd, Changsha, Hunan, Peoples R China 2.Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Li, Wen-Bo,Liu, Lan-Lan,Yang, Ying-Fei,et al. Hot Corrosion Behavior of SiO2-Al2O3-Glass Composite Coating on Ti-47Al-2Cr-2Nb Alloy: Diffusion Barrier for S and Cl[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2019,32(5):599-606.
APA	Li, Wen-Bo,Liu, Lan-Lan,Yang, Ying-Fei,Zhu, Sheng-Long,&Wang, Fu-Hui.(2019).Hot Corrosion Behavior of SiO2-Al2O3-Glass Composite Coating on Ti-47Al-2Cr-2Nb Alloy: Diffusion Barrier for S and Cl.ACTA METALLURGICA SINICA-ENGLISH LETTERS,32(5),599-606.
MLA	Li, Wen-Bo,et al."Hot Corrosion Behavior of SiO2-Al2O3-Glass Composite Coating on Ti-47Al-2Cr-2Nb Alloy: Diffusion Barrier for S and Cl".ACTA METALLURGICA SINICA-ENGLISH LETTERS 32.5(2019):599-606.