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ZnFe2O4基材料在NaF-AlF3-Al2O3熔盐中的腐蚀(英文)
CORROSION OF ZINC FERRITE IN NaF-AlF3-Al2O3 MOLTEN SALTS
【摘要】 采用锌铁尖晶石材料作为铝电解惰性阳极,考察了这种阳极在NaF-AlF3-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,阳极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.
【Abstract】 Zinc 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 anodic polarization.The biggest corrosion rate appears in the range of 0.5~0.75A/cm2.The corrosion rate will get down after that peak value. High anodic current density (>1.5 A/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.
【Key words】 zinc ferrite; spinel material; aluminum electrolysis; inert anode; corrosion in molten salts;
- 【文献出处】 中国腐蚀与防护学报 ,Journal of Chinese Society For Corrosion and Protection , 编辑部邮箱 ,2000年05期
- 【分类号】TG17
- 【被引频次】37
- 【下载频次】122