IMR OpenIR
High-temperature oxidation and hot corrosion behaviors of the NiCr-CrAl coating on a nickel-based superalloy
Ren, X; Wang, FH; Wang, X
Corresponding AuthorRen, X(renxin@imr.ac.cn)
2005-08-01
Source PublicationSURFACE & COATINGS TECHNOLOGY
ISSN0257-8972
Volume198Issue:1-3Pages:425-431
AbstractThe hot-section components in commercial aerogas turbines were typically made of nickel-based superalloys and were protected by coatings. Two kinds of diffusion aluminide coatings, including simple aluminide coating and NiCr-CrAl coating, were prepared on a nickel-based cast superalloy by LP-VCD and pack cementation techniques, respectively. The isothermal oxidation behavior of the cast alloy and the coatings at 1000 and 1100 degrees C and their hot corrosion behaviors in the presence of 75 wt.% Na2SO4+K2SO4 film at 900 degrees C were studied using TGA, scanning electron microscopy (SEM)/energy-dispersive spectrometry (EDS), X-ray diffraction (XRD) and electron probe microanalysis (EPMA), respectively. The results showed that NiCr-CrAl coating, not only held a very excellent oxidation resistance due to the alpha-Al2O3 formation on the coating surface during the isothermal process at 1000 and 1100 degrees C, but also possessed excellent hot corrosion resistance in sulphate melt. Internal oxidation and nitridation were found in the cast alloy during the oxidation process. Moreover, the cast alloy suffered from catastrophic hot corrosion, resulting in the serious internal oxidation and sulfidation. The oxidation resistance of the simple aluminide coating was superior to the cast alloy; the simple aluminide coating was damaged completely and lost its protective effect after the hot corrosion test. In addition, the mechanisms for oxidation and corrosion of the cast alloy and the coatings are discussed simultaneously. (c) 2004 Elsevier B.V. All rights reserved.
KeywordNiCr-CrAl coating isothermal oxidation hot corrosion sulfidation
DOI10.1016/j.surfcoat.2004.10.108
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Coatings & Films ; Physics, Applied
WOS IDWOS:000230419400087
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82311
Corresponding AuthorRen, X
Affiliation1.Chinese Acad Sci, Met Res Inst, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
2.Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Peoples R China
3.Liaoning Tech Univ, Dept Mat Sci & Engn, Fuxing 123000, Peoples R China
Recommended Citation
GB/T 7714
Ren, X,Wang, FH,Wang, X. High-temperature oxidation and hot corrosion behaviors of the NiCr-CrAl coating on a nickel-based superalloy[J]. SURFACE & COATINGS TECHNOLOGY,2005,198(1-3):425-431.
APA Ren, X,Wang, FH,&Wang, X.(2005).High-temperature oxidation and hot corrosion behaviors of the NiCr-CrAl coating on a nickel-based superalloy.SURFACE & COATINGS TECHNOLOGY,198(1-3),425-431.
MLA Ren, X,et al."High-temperature oxidation and hot corrosion behaviors of the NiCr-CrAl coating on a nickel-based superalloy".SURFACE & COATINGS TECHNOLOGY 198.1-3(2005):425-431.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Ren, X]'s Articles
[Wang, FH]'s Articles
[Wang, X]'s Articles
Baidu academic
Similar articles in Baidu academic
[Ren, X]'s Articles
[Wang, FH]'s Articles
[Wang, X]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Ren, X]'s Articles
[Wang, FH]'s Articles
[Wang, X]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.