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本文研制了一种新型活性涂层钛阳极,在硫酸盐体系电积金属镍中,与通常使用的铅银阳极相比,具有较低的槽电压和电能消耗,每生产1t 镍可节省电能485.72kW·h 左右。新型阳极运转寿命长,在工作电流密度700A/m~2下),连续运转24 264 h.电化学研究表明,所研制的阳极对析氧反应具有很高的电催化活性,交换电流密度 i°值为23.44×10~(-5)A/cm~2,比铅银阳极的高两个数量级.对活性涂层钛阳极失效原因进行了分析.
In this paper, a new type of active coating titanium anode has been developed, which has a lower cell voltage and power consumption compared with the commonly used lead-silver anode in the electrowinning nickel sulfate system. It can save energy for every 1t nickel produced. 485.72 kW · h or so. The new anode has a long service life and operates at a current density of 700 A / m 2 for 24 264 h. Electrochemical studies show that the anode has high electrocatalytic activity for the oxygen evolution reaction with an exchange current density i ° Value of 23.44 × 10 ~ (-5) A / cm ~ 2, two orders of magnitude higher than the lead-silver anode.Analysed the causes of the failure of the active coating titanium anode.