Effect of dissolved oxygen content on the oxide structure of Alloy 625 in supercritical water environments at 700°C

Kai-Hsiang Chang; Shih-Ming Chen; Tsung-Kuang Yeh; Ji-Jung Kai

doi:10.1016/j.corsci.2013.11.034

Effect of dissolved oxygen content on the oxide structure of Alloy 625 in supercritical water environments at 700°C

Kai-Hsiang Chang
, Shih-Ming Chen
, Tsung-Kuang Yeh
, Ji-Jung Kai

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

75 Citations (Scopus)

Abstract

The corrosive behavior of Alloy 625 in supercritical water at 700°C and 24.8MPa with dissolved oxygen contents of 150ppb, 1ppm, and 8.3ppm was studied. The oxides grown on all test samples exhibited a duplex-layer structure. The outer layer was composed of a spinel oxide Ni(Cr, Fe)₂O₄ and the inner layer was mainly continuous Cr₂O₃. Ni-containing oxides, such as spinel Ni(Cr, Fe)₂O₄, did not form on samples exposed to the supercritical water environment containing 150ppb dissolved oxygen. Oxygen content might considerably affect the composition and structure of oxides grown in supercritical water for Alloy 625. © 2013 Elsevier Ltd.

Original language	English
Pages (from-to)	21-26
Journal	Corrosion Science
Volume	81
DOIs	https://doi.org/10.1016/j.corsci.2013.11.034
Publication status	Published - Apr 2014
Externally published	Yes

Research Keywords

A. Superalloys
B. TEM
C. Oxidation

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10.1016/j.corsci.2013.11.034

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title = "Effect of dissolved oxygen content on the oxide structure of Alloy 625 in supercritical water environments at 700°C",

abstract = "The corrosive behavior of Alloy 625 in supercritical water at 700°C and 24.8MPa with dissolved oxygen contents of 150ppb, 1ppm, and 8.3ppm was studied. The oxides grown on all test samples exhibited a duplex-layer structure. The outer layer was composed of a spinel oxide Ni(Cr, Fe)2O4 and the inner layer was mainly continuous Cr2O3. Ni-containing oxides, such as spinel Ni(Cr, Fe)2O4, did not form on samples exposed to the supercritical water environment containing 150ppb dissolved oxygen. Oxygen content might considerably affect the composition and structure of oxides grown in supercritical water for Alloy 625. {\textcopyright} 2013 Elsevier Ltd.",

keywords = "A. Superalloys, B. TEM, C. Oxidation",

author = "Kai-Hsiang Chang and Shih-Ming Chen and Tsung-Kuang Yeh and Ji-Jung Kai",

year = "2014",

month = apr,

doi = "10.1016/j.corsci.2013.11.034",

language = "English",

volume = "81",

pages = "21--26",

journal = "Corrosion Science",

issn = "0010-938X",

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TY - JOUR

T1 - Effect of dissolved oxygen content on the oxide structure of Alloy 625 in supercritical water environments at 700°C

AU - Chang, Kai-Hsiang

AU - Chen, Shih-Ming

AU - Yeh, Tsung-Kuang

AU - Kai, Ji-Jung

PY - 2014/4

Y1 - 2014/4

N2 - The corrosive behavior of Alloy 625 in supercritical water at 700°C and 24.8MPa with dissolved oxygen contents of 150ppb, 1ppm, and 8.3ppm was studied. The oxides grown on all test samples exhibited a duplex-layer structure. The outer layer was composed of a spinel oxide Ni(Cr, Fe)2O4 and the inner layer was mainly continuous Cr2O3. Ni-containing oxides, such as spinel Ni(Cr, Fe)2O4, did not form on samples exposed to the supercritical water environment containing 150ppb dissolved oxygen. Oxygen content might considerably affect the composition and structure of oxides grown in supercritical water for Alloy 625. © 2013 Elsevier Ltd.

AB - The corrosive behavior of Alloy 625 in supercritical water at 700°C and 24.8MPa with dissolved oxygen contents of 150ppb, 1ppm, and 8.3ppm was studied. The oxides grown on all test samples exhibited a duplex-layer structure. The outer layer was composed of a spinel oxide Ni(Cr, Fe)2O4 and the inner layer was mainly continuous Cr2O3. Ni-containing oxides, such as spinel Ni(Cr, Fe)2O4, did not form on samples exposed to the supercritical water environment containing 150ppb dissolved oxygen. Oxygen content might considerably affect the composition and structure of oxides grown in supercritical water for Alloy 625. © 2013 Elsevier Ltd.

KW - A. Superalloys

KW - B. TEM

KW - C. Oxidation

UR - https://www.scopus.com/pages/publications/84892990200

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84892990200&origin=recordpage

U2 - 10.1016/j.corsci.2013.11.034

DO - 10.1016/j.corsci.2013.11.034

M3 - RGC 21 - Publication in refereed journal

SN - 0010-938X

VL - 81

SP - 21

EP - 26

JO - Corrosion Science

JF - Corrosion Science

ER -

Effect of dissolved oxygen content on the oxide structure of Alloy 625 in supercritical water environments at 700°C

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