【作者】 梁志荣；

【Author】 LIANG Zhi-rong (China Academy of Engineering Physics,P.O.Box 919-71,Mianyang 621900,China)

【机构】 中国工程物理研究院；

【摘要】 为获取最佳的刻蚀工艺参数,利用铈（Ⅳ）刻蚀法对不锈钢、碳钢和铸铁金属试验样品进行了刻蚀实验。实验结果表明:硝酸浓度对刻蚀液的氧化性能有较大的影响,当硝酸浓度达2mol/L时刻蚀液有较强的氧化性能,再增加硝酸浓度刻蚀液的氧化性能变化不大。在2 mol/L HNO₃+0.05 mol/L铈（Ⅳ）刻蚀液中,经过48 h刻蚀处理,对不锈钢、碳钢和铸铁金属样品的刻蚀深度分别达到了10.1μm、15.2μm和25.4μm,相同条件下退役金属样品钚污染水平由0.48～0.68 Bq/cm²降至0.06～0.08 Bq/cm²,铈（Ⅳ）刻蚀法对金属表面钚污染的去除是一种有效的方法。更多还原

【Abstract】 To acquire optimal corrosion technical parameter,corrosion process experiment was conducted to stainless steel, carbon steel and cast iron.The experiment results showed nitric acid concentration of corrosion solution had stronger effect on oxidation capability and the stronger oxidation capability was acquired when nitric acid concentration of corrosion solution was 2 mol/L.Under 2 mol/L HNO₃+0.05 mol/L cerium（Ⅳ）,the corrosion depth of 10.1,15.2 and 25.4 was obtained by means of 48 h corrosion process to stainless steel,carbon steel and cast iron,respectively.At the same condition, for plutonium contamination ranging from 0.48 Bq/cm² to 0.68 Bq/cm² fell to ranging from 0.06 Bq/cm² to 0.08 Bq/cm². Based the experimental results,it could be inferred that cerium（Ⅳ） corrosion process was a suitable method for decontamination of plutonium contaminated metal surface.更多还原