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Behaviour and Mechanisms of Alkali Metal Sulphate-Induced Cyclic Hot Corrosion in Relation to Gradients and Preoxidised MCrAlY-Type Coatings
Yu, Daqian1,2,3; Gong, Jun2; Sun, Jianping3; Qian, Yuanji3
Corresponding AuthorYu, Daqian(yudq@yuantsing.com)
2022-07-01
Source PublicationCOATINGS
Volume12Issue:7Pages:16
AbstractIn this study, two modified MCrAlY-type coatings were prepared by the same arc ion plating process. 'Gradient annealing' and 'gradient annealing plus preoxidation' were adopted as post-treatments for the two coatings. A two-layer scale of a mixed oxide layer and a pure alumina layer with the alumina next to the substrate was formed on the latter coating. A cyclic hot corrosion test was carried out on them with a conventional MCrAlY-type coating as a reference. The kinetics and evolution of the microstructure showed them to have greater hot corrosion resistance at 900 degrees C. The preformed inner alumina scale by preoxidation retarded the occurrence of internal oxidation-sulphidation to some extent. Additionally, the internal sulphidation-oxidation model is elucidated and extended.
Keywordmetal coatings molten salts EPMA hot corrosion initial oxidation
Funding OrganizationJiangsu Industrial Prospect andKeyCore Technology-Competitive Projects
DOI10.3390/coatings12070912
Indexed BySCI
Language英语
Funding ProjectJiangsu Industrial Prospect andKeyCore Technology-Competitive Projects[BE2019020]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Materials Science, Coatings & Films ; Physics, Applied
WOS IDWOS:000832090200001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174654
Collection中国科学院金属研究所
Corresponding AuthorYu, Daqian
Affiliation1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
3.Tsinghua Univ, Wuxi Res Inst Appl Technol, Wuxi 214072, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Yu, Daqian,Gong, Jun,Sun, Jianping,et al. Behaviour and Mechanisms of Alkali Metal Sulphate-Induced Cyclic Hot Corrosion in Relation to Gradients and Preoxidised MCrAlY-Type Coatings[J]. COATINGS,2022,12(7):16.
APA Yu, Daqian,Gong, Jun,Sun, Jianping,&Qian, Yuanji.(2022).Behaviour and Mechanisms of Alkali Metal Sulphate-Induced Cyclic Hot Corrosion in Relation to Gradients and Preoxidised MCrAlY-Type Coatings.COATINGS,12(7),16.
MLA Yu, Daqian,et al."Behaviour and Mechanisms of Alkali Metal Sulphate-Induced Cyclic Hot Corrosion in Relation to Gradients and Preoxidised MCrAlY-Type Coatings".COATINGS 12.7(2022):16.
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