低浓去污预氧化过程中因科镍690合金和因科镍600合金的电化学行为研究  

Behavior of Inconel 600 and Inconel 690 in Preoxidation Processes with Permanganate Ba sed (NP and AP)

作　　者：温菊花[1] 吕敬琚[1] 胡志辉[1] 

机构地区：[1]中国核动力研究设计院,成都610041

出　　处：《核动力工程》2000年第5期430-434,共5页Nuclear Power Engineering

摘　　要：介绍了低浓去污预氧化过程中两种蒸汽发生器材料因科镍 690合金及因科镍 600合金 (下面简称 690合金及 600合金 )在不同预氧化剂中脱膜效果 (以铬的释放曲线表征 )实验、腐蚀电位迁移测试和极化曲线测试。结果表明， 600合金在碱性高锰酸钾 (AP)中的脱膜效果好于酸性高锰酸钾（ NP）中，而 690合金则在（ NP）中的脱膜效果好于 AP中。并且在 NP中，随着硝酸浓度的增加， 600合金的腐蚀电位向正方向移动， 690合金的腐蚀电位则向负方向移动。从 690合金和 600合金在 NP和 AP溶液中的极化曲线可以看出，随着酸性和碱性浓度的升高， 690合金和 600合金的腐蚀增加。The preoxidation condition with low concentration of nitric acid permanganate and conventional high concentration alkaline permanganate for steam generator material Inconel 690 and 600 oxidation decontamination is discussed.Experiments in three parts have been performed.They are chromium release,measurements of corrosion potentials and polarization curves in NP and AP solutions for Inconel 690 and 600.The results show that AP is more effective than NP at releasing chromium from Inconel 600 oxides while the reverse applies to Inconel 690 oxides.The corrosion potential of Inconel 600 moves in a possitive direction when the acidity becomes high NP while the reverse occurs for Inconel 690 and corrosion increases when the acidity and alkalinity becomes high as can be seen from polarization curves of Inconel 690 and 600 in NP and AP.10041)

关 键 词：压水堆 POD法 蒸汽发生器材料 镍合金 电化学 

分 类 号：TL341[核科学技术—核技术及应用] O646.5[理学—物理化学]