Effect of chromium ion from autoclave material on corrosion behavior of nickel-based alloys in supercritical water

Y. Daigo; Y. Watanabe; K. Sue

doi:10.5006/1.3278354

Effect of chromium ion from autoclave material on corrosion behavior of nickel-based alloys in supercritical water

Y. Daigo, Y. Watanabe, K. Sue

ENG - Quantum Science and Energy Engineering

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

24 Citations (Scopus)

Abstract

Seven kinds of corrosion tests were carried out on thirteen kinds of nickel-based alloys in subcritical and supercritical water containing 0.01 mol/kg sulfuric acid (H₂ SO₄) and 800 ppm oxygen (O₂) using a Ni-44Cr-1Mo autoclave. The obtained corrosion rates were significantly lower than the previous experiments performed under the same conditions using a titanium autoclave. A compact oxide scale was found on the specimens tested in the Ni-44Cr-1Mo autoclave. The chromium-rich oxide layer would originate from the autoclave material and provide a protective function against corrosion. The corrosion retardation phenomenon has been explained by dependencies of chromia (Cr₂O₃) solubility on the phase state of water and temperature.

Original language	English
Pages (from-to)	277-284
Number of pages	8
Journal	Corrosion
Volume	63
Issue number	3
DOIs	https://doi.org/10.5006/1.3278354
Publication status	Published - 2007 Mar

Keywords

Chromium ion
Chromium oxide
Deposition
Nickel-based alloy
Oxide scale
Solubility of oxide
Supercritical water

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

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title = "Effect of chromium ion from autoclave material on corrosion behavior of nickel-based alloys in supercritical water",

abstract = "Seven kinds of corrosion tests were carried out on thirteen kinds of nickel-based alloys in subcritical and supercritical water containing 0.01 mol/kg sulfuric acid (H2 SO4) and 800 ppm oxygen (O2) using a Ni-44Cr-1Mo autoclave. The obtained corrosion rates were significantly lower than the previous experiments performed under the same conditions using a titanium autoclave. A compact oxide scale was found on the specimens tested in the Ni-44Cr-1Mo autoclave. The chromium-rich oxide layer would originate from the autoclave material and provide a protective function against corrosion. The corrosion retardation phenomenon has been explained by dependencies of chromia (Cr2O3) solubility on the phase state of water and temperature.",

keywords = "Chromium ion, Chromium oxide, Deposition, Nickel-based alloy, Oxide scale, Solubility of oxide, Supercritical water",

author = "Y. Daigo and Y. Watanabe and K. Sue",

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T1 - Effect of chromium ion from autoclave material on corrosion behavior of nickel-based alloys in supercritical water

AU - Daigo, Y.

AU - Watanabe, Y.

AU - Sue, K.

PY - 2007/3

Y1 - 2007/3

N2 - Seven kinds of corrosion tests were carried out on thirteen kinds of nickel-based alloys in subcritical and supercritical water containing 0.01 mol/kg sulfuric acid (H2 SO4) and 800 ppm oxygen (O2) using a Ni-44Cr-1Mo autoclave. The obtained corrosion rates were significantly lower than the previous experiments performed under the same conditions using a titanium autoclave. A compact oxide scale was found on the specimens tested in the Ni-44Cr-1Mo autoclave. The chromium-rich oxide layer would originate from the autoclave material and provide a protective function against corrosion. The corrosion retardation phenomenon has been explained by dependencies of chromia (Cr2O3) solubility on the phase state of water and temperature.

AB - Seven kinds of corrosion tests were carried out on thirteen kinds of nickel-based alloys in subcritical and supercritical water containing 0.01 mol/kg sulfuric acid (H2 SO4) and 800 ppm oxygen (O2) using a Ni-44Cr-1Mo autoclave. The obtained corrosion rates were significantly lower than the previous experiments performed under the same conditions using a titanium autoclave. A compact oxide scale was found on the specimens tested in the Ni-44Cr-1Mo autoclave. The chromium-rich oxide layer would originate from the autoclave material and provide a protective function against corrosion. The corrosion retardation phenomenon has been explained by dependencies of chromia (Cr2O3) solubility on the phase state of water and temperature.

KW - Chromium ion

KW - Chromium oxide

KW - Deposition

KW - Nickel-based alloy

KW - Oxide scale

KW - Solubility of oxide

KW - Supercritical water

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JF - Corrosion

SN - 0010-9312

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ER -

Effect of chromium ion from autoclave material on corrosion behavior of nickel-based alloys in supercritical water

Abstract

Keywords

ASJC Scopus subject areas

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