钼离子注入对纯锆耐蚀性的影响  

Influence of Molybdenum Ion Implantation on the Aqueous Corrosion Behavior of Zirconium

作　　者：彭德全[1] 白新德[1] 周庆刚[1] 陈小文[1] 余任泓[1] 刘晓阳[1] 

机构地区：[1]清华大学,北京100084

出　　处：《稀有金属材料与工程》2004年第6期589-593,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(G2000067207-1)

摘　　要：使用MEVVA源对纯锆表面注入1×1016 ions/cm2至5×1017 ions/cm2剂量的钼离子,研究离子注入后其在水溶液中耐蚀性;注入时的最高温度为160℃,加速电压为40 kV。用X光电子谱(XPS)分析表面元素价态;3次极化扫描评价注入样品在0.5 mol/L硫酸水溶液中的耐蚀性,并对3次极化后的样品进行扫描电镜(SEM)观察。实验表明:随着钼离子注入剂量的增大,注入样品的耐蚀性反而下降。剂量越大,耐蚀性下降越多。注入样品的自然腐蚀电位与未注入纯锆相比发生了正移,总的趋势是随着剂量的加大,自然腐蚀电位越正。最后讨论了钼离子注入纯锆后耐蚀性下降的原因。In order to study the effect of molybdenum ion implantation on the aqueous corrosion behavior of zirconium, specimens were implanted by molybdenum ions with a dose range from 1 X 10(16) to 5 X 10(17) ions/cm(2) at maximum 160degreesC, using MEVVA source at an extracted voltage of 40 kV. The valence of the surface layer was analyzed by X-ray photoemission spectroscopy (XPS); Three-sweep potentiodynamic polarization measurement was employed to valuate the aqueous corrosion resistance of zirconium in a 0.5 mol/L H2SO4 solution. Scanning electron microscopy (SEM) was used for the three-sweep potentiodynamic polarized samples. It was found that the aqueous corrosion resistance of zirconium implanted with molybdenum declined with the raising dose. The greater is the implantation dose, the bigger is the decline. And the natural corrosion potential of the implanted zirconium became more positive than as-received zirconium. Finally, the mechanism of the poor corrosion resistance of the molybdenum-implanted zirconium is discussed.

关 键 词：纯锆 耐蚀性 钼离子注入 三电极动电位极化 极化曲线 

分 类 号：TG174.444[金属学及工艺—金属表面处理]