Influence of Zn injection on characteristics of oxide film on 304 stainless steel in borated and lithiated high temperature water |
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| Authors: | Xiahe Liu Xinqiang Wu En-Hou Han |
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| Affiliation: | State Key Laboratory for Corrosion and Protection, Liaoning Key Laboratory for Safety and Assessment Technique of Nuclear Materials, Institute of Metal Research, Chinese Academy of Sciences, 62 Wencui Road, 110016 Shenyang, PR China |
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| Abstract: | The oxide film on 304 stainless steel exposed to the hydrothermal environments at 573.15 K up to 20 days without/with 10 ppb Zn injection has been investigated ex situ by X-ray photoelectron spectroscopy (XPS). ZnFe2O4 and ZnCr2O4 were found to be formed in the oxide film at the initial stage of immersion by substitution reaction between Zn2+ and Fe2+, and ZnCr2O4 became dominant after long-term immersion. The calculations of potential-pH diagrams, solubilities and crystallographic features of spinels have been done to evaluate the oxide film structure and the inhibition mechanism caused by Zn injection. |
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| Keywords: | A Stainless steel A Zinc B XPS C Oxidation C Thermodynamic diagrams |
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