【摘要】 观察钼离子注入对锆-4合金在硫酸水溶液中耐腐蚀性的影响。使用MEVVA(Metalvaporvacuumarc)源对锆-4合金表面注入1×1016—1×1017cm-2剂量的钼离子,用X射线光电子能谱(XPS)分析其表面元素价态;用三次极化扫描评价其在1mol·L–1硫酸水溶液中的耐腐蚀性;并对三次极化后的样品进行扫描电镜(SEM)观察。实验表明,当钼离子注入剂量小于5×1016cm-2时,注入样品的耐腐蚀性显著增强。当钼离子注入剂量为1×1017cm-2时,注入样品的耐腐蚀性反而比未注入时差。讨论了钼离子注入锆-4合金后耐腐蚀性改变的原因。更多还原

【Abstract】 In order to study the effect of molybdenum ion implantation on the aqueous corrosion behavior of zircaloy-4, specimens were implanted by molybdenum ions with a fluence range of 1×1016—1×1017 cm-2. The valence of the surface layer was analyzed by X-ray photoelectron spectroscopy (XPS) and the three-sweep potentiodynamic polarization measurement was employed to evaluate the aqueous corrosion resistance of zirconium in 1 mol·L–1 H2SO4 solution. Scanning electron microscopy (SEM) was used to observe the surface morphology of the three-sweep potentiodynamic polarized samples. It was found that a significant improvement was achieved in the aqueous corrosion behavior of zircaloy-4 implanted with molybdenum ions when the fluence was smaller than 5× 1016 cm-2. When the fluence was higher than 1×1017 cm-2, the corrosion resistance of zircaloy-4 implanted with molybdenum ions decreased as compared with that of the as-received zircaloy-4. Finally, the mechanism of the corrosion resistance improvement of the molybdenum-implanted zirconium was discussed.更多还原