Investigation of Oxide Scale on 304NG Exposed in Supercritical Water

YIN Kaiju; QIU Shaoyu; TANG Rui; ZHANG Qiang; ZHANG Lefu

Mar. 2025

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YIN Kaiju, QIU Shaoyu, TANG Rui, ZHANG Qiang, ZHANG Lefu. Investigation of Oxide Scale on 304NG Exposed in Supercritical Water[J]. Nuclear Power Engineering, 2012, 33(1): 88-92.

Citation:

YIN Kaiju, QIU Shaoyu, TANG Rui, ZHANG Qiang, ZHANG Lefu. Investigation of Oxide Scale on 304NG Exposed in Supercritical Water[J]. Nuclear Power Engineering, 2012, 33(1): 88-92.

YIN Kaiju, QIU Shaoyu, TANG Rui, ZHANG Qiang, ZHANG Lefu. Investigation of Oxide Scale on 304NG Exposed in Supercritical Water[J]. Nuclear Power Engineering, 2012, 33(1): 88-92.

Citation:

YIN Kaiju, QIU Shaoyu, TANG Rui, ZHANG Qiang, ZHANG Lefu. Investigation of Oxide Scale on 304NG Exposed in Supercritical Water[J]. Nuclear Power Engineering, 2012, 33(1): 88-92.

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Investigation of Oxide Scale on 304NG Exposed in Supercritical Water

1. Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu, 610041, China;
2. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

Received Date: 2010-08-25
Rev Recd Date: 2010-10-24

Available Online: 2025-03-08

Abstract

Abstract

The corrosion behavior of an austenitic stainless steel 304NG exposed to supercritical water（SCW） at 500℃,550℃,600℃ and 650℃/25 MPa is investigated by means of scanning electron micro-scope/energy dispersive X-ray spectroscopy and X-ray diffraction.The surface morphology is composed of oxide islands and relative smooth base oxide.Oxide islands is a dual-layered oxide scale,which is mainly composed of an outer magnetite（Fe₃O₄） layer and an inner magnetite/spinel-mixed（Fe₃O₄/FeCr₂O₄） layer,base oxide is a single-layered magnetite/spinel-mixed（Fe₃O₄/FeCr₂O₄） oxide scale.The oxide scale has a tendency to spall,which increases with the increasing of exposure temperature.
- Austenitic stainless steel,
- Supercritical water,
- Corrosion,
- Oxide scale spalling