normal cathode fall

But the energy consumption will increases at the same time with the increase of pot life because of the increase of cathode voltage drops and of the decrease of current efficiency.

电解槽寿命越长,电解槽的大修分摊成本越低;但随着电解槽槽龄增加,阴极压降的上升和电流效率的降低会造成吨铝电耗增加。