Effect of Zinc-injected Water Chemistry on Corrosion Behavior of Zr-Sn-Nb Alloy
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摘要: 采用高压釜腐蚀试验研究Zr-Sn-Nb合金在模拟压水堆一回路注锌水化学环境中的腐蚀行为，对Zr-Sn-Nb合金在无锌和加锌水化学环境中的腐蚀增重、氧化膜形貌等现象进行分析。结果表明：Zr-Sn-Nb合金在无锌和加锌水化学环境中腐蚀150 d时腐蚀增重曲线发生转折，加锌对Zr-Sn-Nb合金腐蚀增重量、腐蚀动力学规律、氧化膜形貌、氧化膜物相、氧化膜厚度、氢化物分布和吸氢浓度无明显影响。
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关键词:
- Zr-Sn-Nb合金 /
- 注锌 /
- 腐蚀
Abstract: The corrosion behavior of Zr-Sn-Nb in the simulated PWR primary circuit zinc-injected aqueous chemical environment was investigated by autoclave corrosion test to analyze the surrosion and oxide film morphology of Zr-Sn-Nb alloy in zinc-free and zinc-added aqueous chemical environment. The results show that the surrosion curve of Zr-Sn-Nb alloy turns when it is corroded in zinc-free and zinc-added aqueous chemical environment for 150 days. Zinc addition has no significant effect on the surrosion, corrosion kinetics law, oxide film morphology, oxide film phase, oxide film thickness, hydride distribution and hydrogen absorption concentration of Zr-Sn-Nb alloy.-
Key words:
- Zn-Sn-Nb alloy /
- Zinc injection /
- Corrosion
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图 1 Zr-Sn-Nb合金在有/无Zn硼锂水溶液中腐蚀增重随时间的变化
Figure 1. Variation of Surrosion of Zr-Sn-Nb Alloy in Boron Lithium Aqueous Solution with or without Zn with Time
图 2 Zr-Sn-Nb合金在不同水质中表面SEM形貌
Figure 2. Surface SEM Morphologies of Zr-Sn-Nb alloy in Different Solutions
图 3 Zr-Sn-Nb合金在不同水质中氧化膜XRD结果
Figure 3. XRD Results of Oxide Film of Zr-Sn-Nb Alloy in Different Solutions
图 4 Zr-Sn-Nb合金在不同水质中氧化膜截面形貌
Figure 4. Cross-sectional Morphology of Oxide Film of Zr-Sn-Nb Alloy in Different Solutions
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