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| CORROSION OXIDATION OF FERRITIC-MARTENSITIC STEEL K1, K2 IN SUPERCRITICAL WATER |
| WEI Yi1, YIN Kaiju2, LIU Jinyun1, QIU Shaoyu2 |
1. College of Materials Science and Engineering,Xihua University, Chengdu 610039;
2. Nuclear Power Institute of China, Chengdu 610041 |
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Abstract The corrosion behavior of two ferritic-martensitic steel K1 and K2 exposed to supercritical water at 500℃ and a pressure of 25 MPa for exposure times of 200 h, 400 h, 600 h, 800 h, 1000 h was investigated. The results from scanning electron microscope/energy dispersive spectroscopy (SEM/EDS) analyses indicated that the oxide scale exhibits typical duplex oxide structure, in which the scale is composed of an outer layer of more porous magnetite，and an inner layer of iron chromium spinel. The results of corrosion dynamic manifest that two materials follow the parabolic rule, and the corrosion oxidation rate of K2 steel is faster than that of K1 steel, but the gap within 5%.
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Received: 03 December 2009
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Corresponding Authors:
YIN Kaiju
E-mail: yinkj1975@163.com
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