Cr6+对321不锈钢在硝酸铀酰溶液中的腐蚀行为影响
Influence of Cr6+ on Corrosion Behavior of Type 321 Stainless Steel in Uranyl Nitrate Solution
摘 要
对321不锈钢在1~4 mol/L HNO3+50 g/L UO2(NO3)2溶液和1~4 mol/L HNO3+50 g/L UO2(NO3)2+4 g/L Cr6+溶液中的均匀腐蚀行为进行了研究.通过比较发现,溶液中的Cr6+极大促进了321不锈钢在硝酸铀酰溶液中的腐蚀.扫描电镜(SEM)和X射线光电子能谱(XPS)分析表明,溶液中的Cr6+使321不锈钢表面膜中的Cr2O3发生了溶解,在321不锈钢晶界和晶粒都发生了严重腐蚀.
Cr6+
硝酸铀酰溶液
腐蚀行为
321 stainless steel
Cr6+
uranyl nitrate solution
corrosion behavior
Abstract
Corrosion behaviors of 321 stainless steel had been investigated in 1-4 mol/L HNO3+50 g/L UO2(NO3)2 solution and 1-4 mol/L HNO3+50 g/L UO2(NO3)2+4 g/L Cr6+ solution.A comparison of the corrosion rates indicated that Cr6+ promoted the corrosion of 321 stainless steel in uranyl nitrate solution.The analysis by SEM and XPS indicated that Cr6+ made Cr2O3 in the surface film of 321 stainless steel dissolved,resulting in the corrosion of grain boundaries and grains.
中图分类号 TG172.6
所属栏目 试验研究
基金项目
收稿日期 2007/6/28
修改稿日期 2007/7/13
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引用该论文: LUO Qiang,QIU Shao-yu,YIN Kai-ju,LIANG Bo. Influence of Cr6+ on Corrosion Behavior of Type 321 Stainless Steel in Uranyl Nitrate Solution[J]. Corrosion & Protection, 2008, 29(3): 113～115
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参考文献
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【2】Baldev Raj,U Kamachi Mudali.Materials development and corrosion problems in nuclear fuel reprocessing plants[J].Progress in Nuclear Energy,2006,48:283-313.
【3】U Mudali,R K Dayal,J B Gnanamoorthy.Corrosion studies on materials of construction for spent nuclear fuel reprocessing plant equipment[J].Journal of Nuclear Materials,1993,203:73-82.
【4】肖纪美.不锈钢的金属学问题[M].北京:冶金工业出版社,1984.
【5】沈冬冬,袁泽喜,宋申华.磷在2.25Cr1Mo钢中晶界偏聚行为的研究[J].武汉大学学报,2004(2):18-21.
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