(東北大學 材料與冶金學院， 沈陽 110004)
摘 要: 對Ni-Fe-Cu合金的抗氧化和耐熔鹽腐蝕性能進行了研究。結果顯示， 該合金的氧化動力學曲線符合拋物線規(guī)則。 靜態(tài)電解質中的溶解腐蝕速率隨溫度的增高和NaF與AlF3的摩爾分子比的降低而增大。 在不同電解條件下，組成為NaF-AlF3-NaCl-CaF2-Al2O3的電解質體系中電解時，該陽極周圍產生大量氣泡， 槽電壓在3.6~4.2之間波動，陽極的電解極化腐蝕速率隨電解質中氧化鋁濃度的增高、 溫度的降低而減小， 產品鋁的純度達到97%~98%。
關鍵字: 惰性金屬陽極； Ni-Fe-Cu合金；低溫鋁電解； 氧化； 熔鹽冰晶石腐蝕
（ School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China）
Abstract: The anti-oxidation and anti-corrosion properties in molten cryolite of Ni-Fe-Cu alloys were studied. The results indicate that the oxidation kinetic curves follow the parabolic law. The dissolution rate in static melt increases with increasing temperature and decreasing cryolite ratio of NaF/AlF3. When electrolysis test was conducted in molten salts consisting of NaF-AlF3-NaCl-CaF2-Al2O3 under different conditions, abundant gas bubble evolved around the used anode and the cell voltage fluctuated from 3.6V to 4.2V. The polarization corrosion rate decreases with increasing concentration of Al2O3 in melts and decreasing temperature. The purity of aluminum product is 97%-98%.
Key words: inert metal anodes; Ni-Fe-Cu alloy; low temperature aluminum electrolysis; oxidation; molten-cryolite corrosion
