汞齐法制备铀保护涂层  

Preparation of Protective Coatings for Uranium with Amalgam

作　　者：沈崇雨[1] 李炬[1] 李嵘[1] 陈亮[2] 郎定木[2] 

机构地区：[1]表面物理与化学重点实验室,四川绵阳621907 [2]中国工程物理研究院,四川绵阳621900

出　　处：《稀有金属材料与工程》2013年第2期377-381,共5页Rare Metal Materials and Engineering

摘　　要：选用Zn、Sn、Au三种金属制备汞齐,在铀表面开展了汞齐法涂层制备工艺研究,利用SEM和EDS对涂层进行了表征,主要研究汞齐法在铀表面制备涂层的工艺,包括镀前处理、氧化层对涂层性能的影响。结果表明:采用汞齐法在铀表面制备金属涂层的方法是可行的,在轻微氧化的样品表面能利用该方法制得结合良好的涂层,氧化层在制备过程中弥散于涂层内。1:1HNO3去除氧化层后,可以制备界面均匀、结合紧密的高质量涂层。可单次制备20～50μm范围的Zn、Sn涂层,可多次制备较厚的Au涂层。Preparation of protective coatings for uranium with amalgam formed by Zn, Sn and Au reacting with Hg respectively was investigated. The coatings were characterized by scanning electron microscope （SEM） and X-ray energy dispersive spectroscope （EDS）. Effects of pretreatment and oxide layer on coatings were also studied. The results show that it is feasible to prepare coatings on uranium surface with amalgam. The thin oxide layer on uranium surface has less effects on the combination between coating and uranium, because the oxide can disperse in the coating during the preparation and fresh uranium was faced to amalgam. 1：1 HNO3 can get rid of the oxide effectively, and better combination between coating and uranium can be obtained. 20-50 μm thickness coatings can be prepared in a single time to Zn and Sn, but to Au, it is necessary to obtain a thick coating repeatedly.

关 键 词：铀 汞齐 涂层 腐蚀 辐射防护 

分 类 号：TG174.44[金属学及工艺—金属表面处理]