期刊
CORROSION SCIENCE
卷 51, 期 9, 页码 2092-2097出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2009.05.041
关键词
Nickel-based alloy; Supercritical water; Corrosion; Oxide scale
资金
- National Basic Research Program of China [2007CB2009800]
The corrosion behavior of a nickel-based alloy Hastelloy C-276 exposed in supercritical water at 500600 degrees C/25 MPa was investigated by means of gravimetry, scanning electron microscopy/energy dispersive X-ray spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy. An oxide scale with dual-layer structure, mainly consisting of an outer NiO layer and an inner Cr2O3/NiCr2O4-mixed layer. developed on C-276 after 1000 h exposure. Higher temperature promoted oxidation, resulting in thicker oxide scale, larger weight gain and stronger tendency of oxide spallation. The oxide growth mechanism in SCW seems to be similar to that in high temperature water vapor, namely solid-state growth mechanism. (C) 2009 Elsevier Ltd. All rights reserved.
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