Amorphization and structural modification of the oxide film of Ni-based alloy by in-situ H charging in high temperature high pressure water environment

[Display omitted] It is often assumed only limited amount of amorphous phase could generate in the oxide film of Ni-based alloy with H-participation. However, in this study, the formation of a remarkable amorphous layer on top of the oxide film of Ni-based Alloy 600 (Ni-15.5Cr-9.4Fe, wt.%) after oxi...

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Bibliographic Details
Published inCorrosion science Vol. 166; p. 108474
Main Authors Wang, Zihao, Takeda, Yoichi
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Ltd 15.04.2020
Elsevier BV
Subjects
A. Alloys
Amorphization
B. SEM
C. Amorphous structures
Charging
High temperature
High temperature corrosion
Hydrogen permeation
Nickel
Nickel base alloys
Oxidation
Oxide coatings
Porosity
STEM
B. SEM
Hydrogen permeation
C. Amorphous structures
A. Alloys
High temperature corrosion
STEM
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Summary:[Display omitted] It is often assumed only limited amount of amorphous phase could generate in the oxide film of Ni-based alloy with H-participation. However, in this study, the formation of a remarkable amorphous layer on top of the oxide film of Ni-based Alloy 600 (Ni-15.5Cr-9.4Fe, wt.%) after oxidizing in high-temperature high-pressure water environment by in-situ H-charging condition is observed. A synergy of the film porosity and PH2O/PH2 is proposed as a plausible mechanism. Cavity layer appeared at the oxide and matrix interface, and the H-distribution are also discussed.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2020.108474