Effects of oxygen concentration on corrosion behavior of alloys in Acidic supercritical water

Yutaka Watanabe; Kazuhiro Shoji; Tadafumi Adschiri; Kiwamu Sue

Effects of oxygen concentration on corrosion behavior of alloys in Acidic supercritical water

Yutaka Watanabe, Kazuhiro Shoji, Tadafumi Adschiri, Kiwamu Sue

Research output: Contribution to journal › Conference article › peer-review

Abstract

Corrosion properties were investigated on stainless steels and Ni-base alloys in supercritical water containing 0.01mol/kg-H₂SO₄ at 400°C/30MPa and 400°C/60MPa as a function of oxygen concentration ranging from 3ppb to 800ppm. Corrosion rates and compositions of oxide scales indicated that Cr was basically the key element for corrosion resistance of the alloys in the testing environments. However, Fe became another major contributor to corrosion resistance when oxygen concentration of the environment was increased up to 800ppm. Oxide stability of Cr, Fe, and Ni estimated as potential-pH diagram is in good agreement with the experimental results.

Original language	English
Journal	NACE - International Corrosion Conference Series
Volume	2002-April
Publication status	Published - 2002
Event	Corrosion 2002 - Denver, United States Duration: 2002 Apr 7 → 2002 Apr 11

Keywords

Austenitic stainless steel
Ni-base alloy
Oxide scale
Oxygen concentration
Phase stability
Sulfuric acid
Supercritical water

ASJC Scopus subject areas

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

Cite this

@article{2dda5720349a4c5a86c95d3cc01c63d9,

title = "Effects of oxygen concentration on corrosion behavior of alloys in Acidic supercritical water",

abstract = "Corrosion properties were investigated on stainless steels and Ni-base alloys in supercritical water containing 0.01mol/kg-H2SO4 at 400°C/30MPa and 400°C/60MPa as a function of oxygen concentration ranging from 3ppb to 800ppm. Corrosion rates and compositions of oxide scales indicated that Cr was basically the key element for corrosion resistance of the alloys in the testing environments. However, Fe became another major contributor to corrosion resistance when oxygen concentration of the environment was increased up to 800ppm. Oxide stability of Cr, Fe, and Ni estimated as potential-pH diagram is in good agreement with the experimental results.",

keywords = "Austenitic stainless steel, Ni-base alloy, Oxide scale, Oxygen concentration, Phase stability, Sulfuric acid, Supercritical water",

author = "Yutaka Watanabe and Kazuhiro Shoji and Tadafumi Adschiri and Kiwamu Sue",

note = "Funding Information: Part of this work was done under financial support from TEPCO Research Foundation. Part of the work was also supported by the Grant-in-Aid for Scientific Research (B) (No.13450290) and for COE Research (No.11CE2003), The Ministry of Education, Sports, Culture, Science and Technology. Publisher Copyright: {\textcopyright} 2002 by NACE International.; Corrosion 2002 ; Conference date: 07-04-2002 Through 11-04-2002",

year = "2002",

language = "English",

volume = "2002-April",

journal = "NACE - International Corrosion Conference Series",

issn = "0361-4409",

publisher = "National Association of Corrosion Engineers",

}

TY - JOUR

T1 - Effects of oxygen concentration on corrosion behavior of alloys in Acidic supercritical water

AU - Watanabe, Yutaka

AU - Shoji, Kazuhiro

AU - Adschiri, Tadafumi

AU - Sue, Kiwamu

N1 - Funding Information: Part of this work was done under financial support from TEPCO Research Foundation. Part of the work was also supported by the Grant-in-Aid for Scientific Research (B) (No.13450290) and for COE Research (No.11CE2003), The Ministry of Education, Sports, Culture, Science and Technology. Publisher Copyright: © 2002 by NACE International.

PY - 2002

Y1 - 2002

N2 - Corrosion properties were investigated on stainless steels and Ni-base alloys in supercritical water containing 0.01mol/kg-H2SO4 at 400°C/30MPa and 400°C/60MPa as a function of oxygen concentration ranging from 3ppb to 800ppm. Corrosion rates and compositions of oxide scales indicated that Cr was basically the key element for corrosion resistance of the alloys in the testing environments. However, Fe became another major contributor to corrosion resistance when oxygen concentration of the environment was increased up to 800ppm. Oxide stability of Cr, Fe, and Ni estimated as potential-pH diagram is in good agreement with the experimental results.

AB - Corrosion properties were investigated on stainless steels and Ni-base alloys in supercritical water containing 0.01mol/kg-H2SO4 at 400°C/30MPa and 400°C/60MPa as a function of oxygen concentration ranging from 3ppb to 800ppm. Corrosion rates and compositions of oxide scales indicated that Cr was basically the key element for corrosion resistance of the alloys in the testing environments. However, Fe became another major contributor to corrosion resistance when oxygen concentration of the environment was increased up to 800ppm. Oxide stability of Cr, Fe, and Ni estimated as potential-pH diagram is in good agreement with the experimental results.

KW - Austenitic stainless steel

KW - Ni-base alloy

KW - Oxide scale

KW - Oxygen concentration

KW - Phase stability

KW - Sulfuric acid

KW - Supercritical water

UR - http://www.scopus.com/inward/record.url?scp=82555163085&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=82555163085&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:82555163085

SN - 0361-4409

VL - 2002-April

JO - NACE - International Corrosion Conference Series

JF - NACE - International Corrosion Conference Series

T2 - Corrosion 2002

Y2 - 7 April 2002 through 11 April 2002

ER -

Effects of oxygen concentration on corrosion behavior of alloys in Acidic supercritical water

Abstract

Keywords

ASJC Scopus subject areas

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