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Corrosion Behavior of GH4169 Alloy under Alternating Oxidation at 900 degrees C and Solution Immersion
Yu, Zhongfen; Liu, Li; Liu, Rui; Cao, Min; Fan, Lei; Li, Ying; Geng, Shujiang; Wang, Fuhui
2019-05-01
Source PublicationMATERIALS
ISSN1996-1944
Volume12Issue:9
AbstractIn this paper, the corrosion behavior of GH4169 superalloy under alternating oxidation (at 900 degrees C) and solution immersion (in 3.5% NaCl solution, 30 +/- 1 degrees C) has been studied by SEM, XRD, XPS, and electron probe microanalysis (EPMA). The results show that the alternating environment increases the corrosion rate of GH4169. The reaction of NaCl and Cr2O3 generates various volatile and soluble corrosion products, such as Na2Cr2O7, CrCl3, Cl-2, and Na2CrO4, at a high temperature. The destruction of the protective Cr2O3 film leads to the increase of defects in the oxide scale, promoting the formation of oxides, such as NiO and Fe2O3, and changes the composition and structure of the oxide film. After repeated iterations, the mixed oxides will result in the spalling of the oxide film because they can reduce the fracture toughness of the corrosion scale. Therefore, the corrosion is comprehensively intensified.
KeywordNi-based superalloy high temperature oxidation
Indexed BySCI
Language英语
WOS IDWOS:000469757500144
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81120
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Yu, Zhongfen,Liu, Li,Liu, Rui,et al. Corrosion Behavior of GH4169 Alloy under Alternating Oxidation at 900 degrees C and Solution Immersion[J]. MATERIALS,2019,12(9).
APA Yu, Zhongfen.,Liu, Li.,Liu, Rui.,Cao, Min.,Fan, Lei.,...&Wang, Fuhui.(2019).Corrosion Behavior of GH4169 Alloy under Alternating Oxidation at 900 degrees C and Solution Immersion.MATERIALS,12(9).
MLA Yu, Zhongfen,et al."Corrosion Behavior of GH4169 Alloy under Alternating Oxidation at 900 degrees C and Solution Immersion".MATERIALS 12.9(2019).
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