Difference of electropolishing and Passivization

What is the difference between electropolishing and Passivization

The passivization process chemically removes these free irons and forms a passive oxide “film” layer which further improves corrosion resistance. This is one advantage of using citric acid vs. nitric acid for making the surface of aluminum being activated. Electropolishing of aluminum first is make the surface being active, while passivization is make the surface of aluminum is being passive and can't react anymore or in other practice called as anodized.

Electropolishing is an electrochemical process used to selectively remove unwanted material on the surface of aluminum before andoding being proceeded. Electropolishing stainless steel also deburrs and passivates the material while enhancing its surface.