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김지현

Kim, Ji Hyun
UNIST Nuclear Innovative Materials Lab.
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Effects of dissolved hydrogen on the crack-initiation and oxidation behavior of nickel-based alloys in high-temperature water

Author(s)
Kim, TaehoChoi, Kyoung JoonYoo, Seung ChangKim, Ji Hyun
Issued Date
2016-05
DOI
10.1016/j.corsci.2016.02.011
URI
https://scholarworks.unist.ac.kr/handle/201301/18593
Fulltext
http://www.sciencedirect.com/science/article/pii/S0010938X16300452
Citation
CORROSION SCIENCE, v.106, pp.260 - 2370
Abstract
The effects of dissolved-hydrogen concentration on the formation of oxide films on Alloy 182 were investigated, along with the crack-initiation time. Results from both in-situ Raman analyses and ex-situ electron microscopy analyses indicated that NiO formed at lower dissolved-hydrogen concentrations as the NiO Raman peak decreased, whereas Cr2O3 peak and spinel oxide peaks appeared as the dissolved-hydrogen concentration increased. Crack-initiation testing showed that the crack-initiation time decreased as the dissolved-hydrogen concentration increased. The stable and thick NiO could act as a barrier to ion diffusion, and may increase the crack-initiation time of nickel-based alloys.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
ISSN
0010-938X
Keyword (Author)
AlloyNickelRaman spectroscopyTEMHigh temperature corrosion
Keyword
METAL WELD INTERFACESSIMULATED PRIMARY WATERSTRESS-CORROSION CRACKINGOXIDE-FILMSGROWTHCHEMISTRYCHROMIUMREACTORSTEELSOXYGEN

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