Role of chromium ion implantation on the corrosion behavior of zirconium in 1N H2SO4 |
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Authors: | D. Q. Peng X. D. Bai R. H. Yu X. W. Chen Q. G. Zhou X. Y. Liu P. Y. Deng |
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Affiliation: | Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China |
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Abstract: | In order to study the effect of chromium ion implantation on the aqueous corrosion behavior of zirconium, specimens were implanted by chromium ions with a dose range from 1×1016 to 1×1017 ions/cm2, using MEVVA source at an extracted voltage of 40 kV. The valence and elements penetration distribution of the surface layer were analyzed by X-ray photoelectron spectroscopy (XPS) and auger electron spectroscopy (AES), respectively. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to examine the micro-morphology and microstructure of chromium-implanted samples. The potentiodynamic polarization measurement was employed to value the aqueous corrosion resistance of zirconium in a 1N H2SO4 solution. It was found that a significant improvement was achieved in the aqueous corrosion resistance of zirconium compared with that of as-received zirconium. The mechanism of the corrosion resistance improvement of chromium-implanted zirconium is probably due to the addition of the chromium oxide dispersoid into the zirconium matrix. |
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Keywords: | Zirconium Corrosion resistance Chromium ion implantation Immersion test X-ray photoemission spectroscopy (XPS) Auger electron spectroscopy (AES) |
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