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将电化学分离Zr-4合金中Zr(Fe,Cr)2第二相粒子的技术和原子吸收光谱分析技术相结合,建立了一种分析Zr-4合金α-zr固溶体中Fe和Cr含量的新方法,并用这种新方法分析了不同热处理状态下Zr-4合金α-zr固溶体中的Fe和Cr含量。分析结果表明,随着淬火温度的增加, α-zr固溶体中的Fe,Cr含量和Fe/Cr比值均增加,而Zr(Fe,Cr,)2第二相粒子中的Fe/Cr比值则相应降低,并且在淬火状态,α-zr固溶体中Fe,Cr的含量均大于其最大饱和固溶度。结合以前在高温水、蒸汽中的腐蚀试验结果发现,α-zr固溶体中的Fe,Cr含量对Zr-4合金的耐水侧腐蚀性能起着重要作用,并且,过饱和固溶在α-zr中的Fe,Cr含量存在一临界值,当Fe和Cr含量大于临界值时,Zr-4合金就具备抗疖状腐蚀的能力。
The electrochemical separation of Zr (Fe, Cr) 2 second-phase particles in Zr-4 alloy and atomic absorption spectrometry were combined to establish a method to analyze the contents of Fe and Cr in the α-zr solid solution of Zr-4 alloy The new method was used to analyze the contents of Fe and Cr in α-zr solid solution of Zr-4 alloy under different heat treatment conditions. The results show that with the increase of quenching temperature, the content of Fe, Cr and the ratio of Fe / Cr in the α -zr solid solution increase, while the ratio of Fe / Cr in the second phase particles of Zr (Fe, Cr, Lower, and in the quenched state, α-zr solid solution Fe, Cr content is greater than its maximum saturated solubility. Combined with the previous corrosion tests in high temperature water and steam, it was found that the content of Fe and Cr in the α-zr solid solution plays an important role in the water-side corrosion resistance of the Zr-4 alloy, and supersaturated solid solution in α-zr Of Fe, Cr content there is a critical value, when the Fe and Cr content greater than the critical value, the Zr-4 alloy with anti-Corrosion-like ability to corrosion.