• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Corrosion of plutonium metal when stored in containers having plastic components.
【24h】

Corrosion of plutonium metal when stored in containers having plastic components.

机译：当钚金属储存在具有塑料部件的容器中时，腐蚀金属。

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The conclusions are: (1) The formation of powder or ''oxide'' in the storage container is caused almost entirely by packaging of plutonium in plastic materials. (2) The corrosion of the plutonium follows degradation of the plastic due to the intense radiation. (3) The powder, formed by this corrosion is not PuO(sub 2) but a mixture of oxides, hydrides, and chlorides in varying proportions, depending on the type and amount of plastic in the individual storage container. (4) The powder consists predominantly of hydrides. Hydrogen is considered the major cause of severe corrosion. The surface-disruptive nature of hydriding prevents formation of any protective film on the metal. Fresh surface is provided continuously for further attack. (5) The hydrides are pyrophoric. Spontaneous ignition of the powder and metal occurs occasionally, immediately following opening of the container. This effect may be more severe for ingots than for buttons because of unreacted- or only partially-reacted metal fines in the powder from ingots. (6) Metal loss of eight percent in 100 days of storage has been observed for unalloyed ingot metal of moderate purity under the storage conditions described in this report. Corrosion rate depends on purity of the metal. Impurities in unalloyed metal inhibit corrosion. (7) Corrosion rate increases exponentially with duration of storage. For a 2000 g of moderate purity, the rate of weight loss per month, as percentage of initial weight, is about 2.0 percent at the end of one month, 2.8 percent at the end of three months. (8) The corrosion rate for buttons is less than that for ingot metal of moderate purity by a factor of 18- to 90-fold. Calcium (or calcium fluoride) as an impurity in buttons may be an important corrosion inhibitor under the storage conditions; and (9) Packaging of plutonium metal in all-metal containers -- free of all organic materials -- should permit storage indefinitely with formation of not more than a gram or two of PuO(sub 2).

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号