The mechanism of oxide film formation on Alloy 690 in oxygenated high temperature water

Wenjun Kuang; Xinqiang Wu; En Hou Han; Jiancun Rao

doi:10.1016/j.corsci.2011.07.038

The mechanism of oxide film formation on Alloy 690 in oxygenated high temperature water

Wenjun Kuang
, Xinqiang Wu
, En Hou Han
, Jiancun Rao

Research output: Contribution to journal › Article › peer-review

120 Scopus citations

Abstract

Oxide films formed on Alloy 690 exposed to 290°C water containing 3ppm O₂ were investigated. It was found that Cr rich oxides form initially through solid-state reactions. Ni-Fe spinels gradually develop on surface layer by precipitation with increasing immersion time. Initially formed Cr rich oxides react with outwards diffusing Ni and Fe to form small spinel particles which then vanish gradually. An inner layer develops from oxide/matrix interface through inward diffusion of oxidant. Cr is preferentially oxidized and tends to dissolve into solution. The resultant inner layer consists of predominant NiO which cannot serve as a protective barrier layer.

Original language	English
Pages (from-to)	3853-3860
Number of pages	8
Journal	Corrosion Science
Volume	53
Issue number	11
DOIs	https://doi.org/10.1016/j.corsci.2011.07.038
State	Published - Nov 2011
Externally published	Yes

Keywords

A. Alloy
B. SEM
B. TEM
B. XPS
C. High temperature corrosion
C. Oxidation

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10.1016/j.corsci.2011.07.038

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title = "The mechanism of oxide film formation on Alloy 690 in oxygenated high temperature water",

abstract = "Oxide films formed on Alloy 690 exposed to 290°C water containing 3ppm O2 were investigated. It was found that Cr rich oxides form initially through solid-state reactions. Ni-Fe spinels gradually develop on surface layer by precipitation with increasing immersion time. Initially formed Cr rich oxides react with outwards diffusing Ni and Fe to form small spinel particles which then vanish gradually. An inner layer develops from oxide/matrix interface through inward diffusion of oxidant. Cr is preferentially oxidized and tends to dissolve into solution. The resultant inner layer consists of predominant NiO which cannot serve as a protective barrier layer.",

keywords = "A. Alloy, B. SEM, B. TEM, B. XPS, C. High temperature corrosion, C. Oxidation",

author = "Wenjun Kuang and Xinqiang Wu and Han, \{En Hou\} and Jiancun Rao",

year = "2011",

month = nov,

doi = "10.1016/j.corsci.2011.07.038",

language = "英语",

volume = "53",

pages = "3853--3860",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

number = "11",

}

TY - JOUR

T1 - The mechanism of oxide film formation on Alloy 690 in oxygenated high temperature water

AU - Kuang, Wenjun

AU - Wu, Xinqiang

AU - Han, En Hou

AU - Rao, Jiancun

PY - 2011/11

Y1 - 2011/11

N2 - Oxide films formed on Alloy 690 exposed to 290°C water containing 3ppm O2 were investigated. It was found that Cr rich oxides form initially through solid-state reactions. Ni-Fe spinels gradually develop on surface layer by precipitation with increasing immersion time. Initially formed Cr rich oxides react with outwards diffusing Ni and Fe to form small spinel particles which then vanish gradually. An inner layer develops from oxide/matrix interface through inward diffusion of oxidant. Cr is preferentially oxidized and tends to dissolve into solution. The resultant inner layer consists of predominant NiO which cannot serve as a protective barrier layer.

AB - Oxide films formed on Alloy 690 exposed to 290°C water containing 3ppm O2 were investigated. It was found that Cr rich oxides form initially through solid-state reactions. Ni-Fe spinels gradually develop on surface layer by precipitation with increasing immersion time. Initially formed Cr rich oxides react with outwards diffusing Ni and Fe to form small spinel particles which then vanish gradually. An inner layer develops from oxide/matrix interface through inward diffusion of oxidant. Cr is preferentially oxidized and tends to dissolve into solution. The resultant inner layer consists of predominant NiO which cannot serve as a protective barrier layer.

KW - A. Alloy

KW - B. SEM

KW - B. TEM

KW - B. XPS

KW - C. High temperature corrosion

KW - C. Oxidation

UR - https://www.scopus.com/pages/publications/80052334830

U2 - 10.1016/j.corsci.2011.07.038

DO - 10.1016/j.corsci.2011.07.038

M3 - 文章

AN - SCOPUS:80052334830

SN - 0010-938X

VL - 53

SP - 3853

EP - 3860

JO - Corrosion Science

JF - Corrosion Science

IS - 11

ER -

The mechanism of oxide film formation on Alloy 690 in oxygenated high temperature water

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Keywords

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