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在鋁电解中,碳素阳极是浸于溫度950～980℃的电解质中。阳极的质量对电解的正常操作有着巨大的影响。阳极必須很純,因为在其灰份中所含的一些元素,如某些金屬和硅能够进入鋁而沾污了产品。同样重要的是,阳极应当是很牢固的,这能避免产生裂縫,因为裂縫会妨碍电流的分布。阳极的消耗应是均勻的,沒有碳渣进入到电解槽里去。此外,阳极还必须能經受佳溫度的突变(例如当阳极浸于熔融电解质中时,溫度驟然从其周圍温度上升至950℃)而不致于破裂。
In aluminum electrolysis, the carbon anode is immersed in an electrolyte at a temperature of 950 to 980 ° C. The quality of the anode has a huge influence on the normal operation of electrolysis. The anode must be very pure because some of the elements contained in its ash, such as certain metals and silicon, can enter the aluminum and contaminate the product. Equally important, the anode should be strong, which avoids cracks, since the cracks can hinder current distribution. Anode consumption should be uniform, no carbon residue into the cell to go. In addition, the anode must also be able to withstand sudden changes of good temperature (for example when the anode is immersed in molten electrolyte, the temperature suddenly rises from its ambient temperature to 950 ° C) without rupture.