Questions about ion membrane electrolyzers
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This post was last edited by sunjl1981 on 2013-1-7 00:26 Why the unit slots in front of the midpoint cannot be interchanged with those behind the midpoint # hcbbs
In the negative electrode type ion membrane electrolyzer, when the auxiliary electrode is in the B area, once the power is turned on, the passivated titanium protective film is subject to reduction. If it is changed to area A, it becomes an oxidation reaction. The passive titanium protective film subjected to the reduction reaction dissolves in the oxidation reaction, and the speed of precipitating metal ions is accelerated, and it will be corroded soon. Therefore, the electrodes in the AB area cannot be replaced at will.
Auxiliary electrode, is it a polarizing electrode?； Why are there differences in oxidation and reduction between the two zones?
Half of the unit slots connected to the positive terminal are zone A, and half of the unit slots connected to the negative terminal are zone B. The order of the unit slots in the initial installation of the slots can be changed before power is turned on. Once powered on, the unit slot arrangement area and order must not be changed at will. If the order is changed due to unit slot replacement, etc., the following principles must be followed: 1. The order of unit slots in areas AB can be changed at will. 2.A The unit tank in area B can be adjusted to area B 3. The unit tank in area B cannot be adjusted to area A for use. The specific reasons are as follows: 1. The tank frame is deformed after long-term use, and random replacement can easily lead to loose sealing and leakage. 2. The unit tank in area B connected to the negative end of the electricity can be adjusted to area A for use. The increase in potential may easily cause the coating to fall off.
I want to know the reason why the potential increases. Area A is a positive voltage and area B is a negative voltage to the ground. The voltages are equal. There is also the role of auxiliary electrode.