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| INFLUENCE OF DISSOLVED HYDROGEN ON OXIDATION OF STAINLESS STEEL 316L IN SIMULATED PWR PRIMARY WATER |
| PENG Qingjiao, ZHANG Zhiming,WANG Jianqiu, HAN En-Hou, KE Wei |
| Liaoning Key Laboratory for Safety and Assessment Technique of Nuclear Materials, State Key Laboratory for Corrosion and Protection, Institute of Metal Research , Chinese Academy of Sciences, Shenyang 110016 |
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Abstract Scanning electron microscope（SEM），X-ray diffraction（XRD），X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM) were used to analyze the morphology, structure and chemical composition of the oxide films formed on stainless steel(SS) 316L in the simulated pressurized water reactor (PWR) primary water at 325℃. The results showed that the oxide film formed on 316L SS in high-temperature and high-pressure solution without dissolved hydrogen had a double layer structure composed of iron-rich outer layer and chromium-rich inner layer. With increasing dissolved hydrogen, the outer big oxide particles became small and more compact, but all the oxide films were consisted of spinel oxide. XPS results indicated that, with increasing dissolved hydrogen, the thickness of the oxide film increased. In addition, the nickel content in the oxide film increased, whereas the chromium content decreased.
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Received: 28 April 2011
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Corresponding Authors:
WANG Jianqiu
E-mail: wangjianqiu@imr.ac.cn
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