A 60 Anodic behaviour of the Cu82Al8Ni5Fe5 alloy in low-temperature aluminium electrolysis / А. P. Khramov, V. A. Kovrov, Y. P. Zaikov, V. M. Chumarev // Corrosion Science. - 2013. - Vol. 70. - P194-201 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): АНОД -- ЭЛЕКТРОЛИЗ -- РАСТВОРЕНИЕ -- ЭЛЕКТРОЛИТ Аннотация: A Cu82Al8Ni5Fe5 wt.% alloy was evaluated as an inert anode in the electrolysis of an Al2O3-saturated, KF35.6–NaF12–LiF3–(AlF3)49.4 melt (790 °С) for 73 h. It was shown that metal consumption at the alloy/scale interface led to the formation of a ring-like gap that was filled with oxygen-free electrolyte. It was hypothesised that the electrochemical transfer of the alloy components through the gap occurred and the chemical oxidation of the alloy particles after the dissolution-deposition process took place in the scale. It was concluded that the rate of scale formation was governed by the percentage of current that had passed through the gap |