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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-Bo1; Liu, Lan-Lan1; Yang, Ying-Fei2; Zhu, Sheng-Long3; Wang, Fu-Hui3
Corresponding AuthorYang, Ying-Fei(yfyang@jnu.edu.cn)
2019-05-01
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume32Issue:5Pages:599-606
AbstractType 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.
KeywordCorrosion Composite coating Ti-47Al-2Cr-2Nb alloy Diffusion
Funding OrganizationNational Natural Science Foundation of China ; National High Technology Research and Development Program of China (863 Program)
DOI10.1007/s40195-018-0842-1
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51201171] ; National High Technology Research and Development Program of China (863 Program)[2012AA03A512]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000463780700007
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/132940
Collection中国科学院金属研究所
Corresponding AuthorYang, Ying-Fei
Affiliation1.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
Recommended Citation
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.
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