What is the black substance that stains the ion membrane, and how does it appear?
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This post was last edited by sunjl1981 on 2013-1-6 21:55. Is the black substance deposited on the ion exchange membrane iron oxide? Is the substance that darkens your hand when touched on the cathode mesh layer evidence of layer peeling? {:1_90:} :P , , -
There are two possible reasons why the ion membrane turns black: first, the black substance on the anode side is likely iron. II. The black color on the cathode side should indicate coating peeling off.
As a supplementary point, blackening on the cathode side could also be due to nickel deposition. If the system’s catholyte contains high levels of iron, iron will also adhere to the membrane.
Reply to 2# renzongkai: Is this issue present in your electrode sheet layers?
Reply to 3# nbocc: Is it the case that all layers are experiencing loss and peeling?
It is an iron oxide; if the cell is used for a long time, the coating may peel off as well, but it is generally iron oxide