凝胶去污实验  

An Experimental Study on Gels Decontamination

作　　者：刘志辉[1] 王永仙[2] 蒋婧[1] 

机构地区：[1]环境保护部核与辐射安全中心,北京100082 [2]中国辐射防护研究院,山西太原030006

出　　处：《核化学与放射化学》2013年第5期317-320,共4页Journal of Nuclear and Radiochemistry

摘　　要：凝胶去污为一先进的放射性污染金属去污技术.氧化凝胶对不锈钢、酸性凝胶对碳钢、碱性凝胶对铝材均具有良好腐蚀效果.采用喷涂法,实验研究凝胶用量和作用时间对腐蚀效果的影响.结果表明,控制氧化凝胶用量大于0.6 kg/m^2、作用时间为3～4 h时,即可实现腐蚀去除不锈钢类污染金属的表层超过1 μm;控制酸性凝胶用量大于0.4 kg/m^2、作用时间为30 min时,可实现对碳钢的腐蚀深度大于3.5μm；控制碱性凝胶用量为0.5 kg/m^2、作用时间为1h时,对铝材腐蚀深度最大可达35 μm,但超过2h时腐蚀深度出现负值.Gels decontamination technology is an advanced decontamination process of metal contaminated by radionuclide.Oxidizing gels have strong corrosion effects on stainless steels,so are acid gels on carbon steels and alkaline gels on aluminum.By spraying method,the experiment is focused on how the content of gels and contact time affect corrosion.The results show that the layers of stainless metals contaminated by radionuclide are stripped over 1μm when the contents of oxidizing gels are limited to more than 0.6 kg/m^2 within 3-4 h; the layers of carbon steels are stripped over 3.5 μm when the contents of acid gels are limited to more than 0.4 kg/m^2 within 30 min; the layers of aluminum are stripped to the maximum of 35 μm when the contents of alkaline gels are limited to more than 0.5 kg/m^2 within 1 h,however,the corrosion depth is below zero when contact time is over 2 h.

关 键 词：凝胶 金属 腐蚀 去污 

分 类 号：TL944[核科学技术—辐射防护及环境保护]