压水堆一回路水中锌含量对镍基690合金氧化膜的影响
Effects of Zinc Concentration on Oxide Films of Alloy 690 in PWR Primary Water
摘 要
在模拟压水堆一回路水环境中, 对镍基690合金进行了在加锌量分别为10, 60, 120 μg/L的三组320 ℃高温溶液中600 h的腐蚀试验, 并对腐蚀后的试样表面进行了X射线光电子能谱(XPS)分析。结果表明, 随着锌浓度的增加, 试样的腐蚀增重速率降低, 氧化膜厚度减薄, 降低腐蚀速率的有效加锌量范围为10～60 μg/L; 试样表面形成主要成分为ZnCr2O4和Cr2O3的氧化膜。
690合金
Zn浓度
氧化膜
XPS分析
pressurized water reactor (PWR)
alloy 690
zinc concentration
oxide film
XPS analysis
Abstract
The effects of zinc concentration on the oxide films of alloy 690 were investigated in simulated pressurized water reactor(PWR) primary water. After exposed in 320 ℃ solutions with the zinc concentration of 10, 60, 120 μg/L, respectively, for 600 h , oxide films developed on the surface of specimens were analyzed by X-ray photoelectron spectroscopy (XPS). The results show that with the increase of zinc concentration, the weight gain rate decreased, and the oxide film became thinner. The range of effective zinc concentration to reduce corrosion rate was advised between 10 to 60 μg/L. The main compontents of the oxide film after exposure in zinc addition solutions were ZnCr2O4 and Cr2O3.
中图分类号 TG174
所属栏目 试验研究
基金项目 大型先进压水堆核电站重大专项(2011ZX06004010)
收稿日期 2013/6/5
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备注张乐福, 副教授, 博士, 从事核电材料腐蚀性能研究,
引用该论文: DUAN Zhen-gang,PAN Xiang-feng,ZHANG Le-fu,WANG Li,XU Xue-lian,SHI Xiu-qiang. Effects of Zinc Concentration on Oxide Films of Alloy 690 in PWR Primary Water[J]. Corrosion & Protection, 2014, 35(4): 348
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参考文献
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【3】MACHET A, GALTAYRIES A, MARXCUS P, et al. XPS study of oxides formed on nickel-base alloys in high-temperature and high-pressure water[J]. Surface and Interface Analysis, 2002, 34(1):197-200.
【4】ROBERTSON J. The mechanism of high temperature aqueous corrosion of stainless steels[J]. Corrosion Science, 1991, 32(4):443-465.
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【6】HUANG J, LIU X, HAN E H, et al. Influence of Zn on oxide films on alloy 690 in borated and lithiated high temperature water[J]. Corrosion Science, 2011, 53(10):3254-3261.
【7】乔培鹏, 张乐福, 刘瑞芹, 等. 压水堆条件下锌对奥氏体不锈钢腐蚀性能的影响[J]. 原子能科学技术, 2010, 44(6):690-693.
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