采用锌铁尖晶石材料作为铝电解惰阳极，考察了这种阳极在NaF3-Al2O3熔盐中的腐蚀行为，阳极电流密度为0-2.5A/cm2.实验结果表明,锌铁尖晶石材料在阳极极化条件下的NaF-AlF3-Al2O3熔盐中具有很好的耐腐蚀性能.在低电流密度下,阳检材料的腐蚀速度随电流密度的增大而增大,最高的腐蚀速度出现于0.5-0.75A/cm2.此后,腐蚀速度随电流密度的增大而降低.实验证明,高阳极电流密度(>1.5A/cm2)\熔盐电解质中保持高Al2O3含量和低NaF/AlF3摩尔比,对降低阳极材料的腐蚀速度有利,这也将是惰性阳极应用的重要条件.
Zine ferrite was used as inert anode materials for aluminum electrolysis.The corrosion behavior of zinc ferrite as investigated under the anodic current density of 0-2.5A/cm2. Experimental results prove that zinc ferrite materials is very corrosion resistant to molten NaF-AlF3-Al2O3 under the condition of anodic polarization.The biggest corrosion rate appears in the range of 0.5-0.75A/cm2.The corrosion rate will get down after that pesk value.High anodic current density(>1.5A/cm2), high alumina concentration and low mole ratio of NaF/AlF3 in the molten salts would be the most important conditions for using inert anode.
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