为研究AP1000一回路冷却剂中加锌对安全端同材焊接区域的影响,采用金相显微镜、扫描电镜(SEM)、能谱仪以及X射线光电子能谱仪(XPS)等测试方法,分析了316LN/316L不锈钢焊接接头在模拟压水堆一回路冷却剂加锌环境下的氧化特性.结果表明:焊接接头母材区、热影响区和焊缝区的金相组织之间存在明显的熔合线,母材区与热影响区均为奥氏体,且热影响区晶粒稍显粗大,焊缝区则有少量铁素体析出;未加锌环境中母材区氧化膜呈黑色,焊缝区氧化膜呈暗红色,氧化膜表面与焊缝区无明显差异;加锌10 μg/L母材区与焊缝区氧化膜均呈现黑色,比未加锌时焊接接头氧化物的颗粒更小,未加锌焊缝区的氧化膜比母材区更薄;加锌溶液中各区域氧化膜厚度趋于一致,比未加锌的减小近45％.
参考文献
| [1] | 张文钺;周振丰.焊接冶金与金属焊接性[M].北京:机械工业出版社,1988:50-100. |
| [2] | S. E. Ziemniak;M. Hanson .Zinc treatment effects on corrosion behavior of 304 stainless steel in high temperature, hydrogenated water[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2006(9):2525-2546. |
| [3] | Stephen E. Ziemniak;Michael Hanson .Zinc treatment effects on corrosion behavior of Alloy 600 in high temperature, hydrogenated water[J].Corrosion Science,2006(10):3330-3348. |
| [4] | Junbo Huang;Xiahe Liu;En-Hou Han;Xinqiang Wu .Influence of Zn on oxide films on Alloy 690 in borated and lithiated high temperature water[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2011(10):3254-3261. |
| [5] | Xiahe Liu;Xinqiang Wu;En-Hou Han .Effect of Zn injection on established surface oxide films on 316 L stainless steel in borated and lithiated high temperature water[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2012(Dec.):136-144. |
| [6] | Perkins D .Pressurized water reactor primary water zinc application guidelines[R].Palo Alto:Electric Power Research Institute,2006. |
| [7] | Yeh T K;Huang G R;Wang M Y et al.Stress corrosion cracking in dissimilar metal welds with 304L stainless steel and Alloy 82 in high temperature[J].Progress in Nuclear Energy,2013,63:7-11. |
| [8] | 严连菊,傅存海.全自动窄间隙钨极氩弧焊和传统手工焊焊接接头性能比较[J].科技视界,2012(26):78-79,502. |
| [9] | Beltran R;Maldonado J G;Murr L E et al.Effect of strain and grain size on carbide precipitation and corrosion sensitization behavior in 304 stainless steel[J].Acta Metallurgica Inc,1997,45(10):4351-4360. |
| [10] | Katayama S;Fujimoto T;Matsunawa A .Correlation among solidification process,microstructure,microsegregation and solidification cracking susceptibility in stainless steel weld metals[J].Transactions of the JWRI,1985,14(1):123-138. |
| [11] | 余宗森;田中卓.金属物理[M].北京:冶金工业出版社,1982:152-158. |
| [12] | T.L. Sudesh;L. Wijesinghe;Daniel John Blackwood .Photocurrent and capacitance investigations into the nature of the passive films on austenitic stainless steels[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(1):23-34. |
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