Electropolishing is a process treatment of aluminum using electric current in a chemical solution. Chemicals solution use can be different of each type of purpose, for more detail can see on Electropolishing of Aluminum. Electropolishing is make the surface of aluminum is open, the pore of oxide film that already stay on the surface of aluminum oxide will remove and open. Oxide film surface can be formed in transportation or keeping in the store or just exposed to air. So the purpose of electropolishing is opening the oxide film surface on the aluminum surface.
In detail of electropolishing can see on the list of this process applied. Basically use electric current to open the surface of oxide film on aluminum surface. Here are the list detail process of electropolishing:
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