Anodic behavior of nickel-based alloys in the electrolytic production of NF3
Anodic behavior of nickel-based alloys in the electrolytic production of NF3
复制标题
镍基合金电解生产 NF3 时的阳极行为
DOI：
10.1016/j.jfluchem.2005.04.007
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发表时间：
2005
影响因子：
1.9
通讯作者：
A. Tasaka
中科院分区：
文献类型：
--
作者：
Atsuhisa Mimoto;Sojiro Kon;Tsuyoshi Maeda;T. Motomura;K. Nishimura;M. Inaba;A. Tasaka
采用1000°C、2× 108 Pa、2 h热等静压（HIP）工艺制备了Ni-Co、Ni-Mn、Ni-Ag、Ni-Cu、Ni-Al和Ni-Si等镍基合金，并将其用作电解生产NF 3的阳极。Ni-Co、Ni-Mn、Ni-Ag、Ni-Cu、Ni-Al和Ni-Si合金的NF_3生成电流效率分别为42-38、52-40、52-47、63-62、50和41%。只有Cu含量低于10mol%的Ni-Cu合金的电流效率与Ni片和HIP Ni阳极的电流效率几乎相同，而本研究中使用的其他合金的电流效率与Ni片和HIP Ni阳极的电流效率相比都较小。Ni-Co、Ni-Mn、Ni-Ag、Ni-Cu、Ni-Al和Ni-Si合金电极阳极溶解引起的电流损失分别为7.95-4.42、6.40-7.02、5.60-6.30、3.34-6.33、5.10和0.18%。Ni-5mol%Cu和Ni-5mol%Si合金的阳极消耗与镍片和热等静压镍电极的阳极消耗几乎相同或更小，但所用的其他合金的阳极消耗与这两种镍阳极相比较大。因此，在镍基体中添加Cu可以在保持与Ni阳极相同的电流效率的情况下降低阳极成本，并且在镍基体中添加Si可以有效地降低阳极消耗。含有微量杂质（例如Co、Mn、Ag和Al）的Ni片电极也有利地作为用于电解生产NF 3的阳极。
The Ni-based alloys, such as Ni–Co, Ni–Mn, Ni–Ag, Ni–Cu, Ni–Al and Ni–Si, prepared by hot isostatic pressing (HIP) at 1000°C under 2×108Pa for 2h were employed as the anodes for electrolytic production of NF3. The current efficiencies for NF3formation were 42–38, 52–40, 52–47, 63–62, 50 and 41% for Ni–Co, Ni–Mn, Ni–Ag, Ni–Cu, Ni–Al and Ni–Si alloys, respectively. The current efficiencies only on Ni–Cu alloys with Cu concentrations lower than 10mol% were almost the same as those on Ni sheet and HIPed Ni anodes, whereas those on the other alloys used in this study were smaller compared with those on both Ni anodes. On the other hand, the current losses caused by anodic dissolution of Ni–Co, Ni–Mn, Ni–Ag, Ni–Cu, Ni–Al and Ni–Si alloy electrodes were 7.95–4.42, 6.40–7.02, 5.60–6.30, 3.34–6.33, 5.10 and 0.18%, respectively. The anode consumptions of Ni–5mol% Cu and Ni–5mol% Si alloys were almost the same or smaller compared with those of Ni sheet and HIPed Ni electrodes, though those of other alloys used were large compared with those of both Ni anodes. Consequently, addition of Cu to the nickel matrix is available for a cheaper cost of anode with keeping a same current efficiency as that on the Ni anode and addition of Si to the nickel matrix is effective for decreasing anode consumption largely. A Ni sheet electrode containing a trace of impurities, such as Co, Mn, Ag and Al, is also favorable as the anode for electrolytic production of NF3.