Complaint
Process: crude iron is made into thick plate in advance as anode, pure iron is made into thin plate as cathode, and the mixed solution of sulfuric acid and ferrous sulfate is used as electrolyte. After power on, iron loses electrons at the anode and generates ferrous ions (Fe2 +) to move to the cathode. After reaching the cathode, it obtains electrons and precipitates pure iron (also known as electrolytic iron) at the cathode. Impurities in crude iron, such as aluminum, which is more active than iron, will dissolve into ions with iron. Since these ions are not easy to precipitate compared with iron ions, the precipitation of these ions on the anode can be avoided as long as the potential difference is properly adjusted during electrolysis.
