We recently had a customer ask us: “Do you do barrel electropolishing, or do the products have to be racked?”
To the best of my knowledge there is no way to do barrel electropolishing. All products need to be racked. The reason for racking the products to be electropolished is because they need to be individually connected to the electrode to receive the electric charge for the process to occur.
Passivation and Pickling
It is however possible to do barrel stainless steel passivation or barrel metal pickling. There are many passivation manufacturers which have a barrel and some sort of shaking process which makes sure that the products get full coverage across the surface of the product in the liquid.
The main reason that electropolishing is a costlier process than passivation or pickling is because the products need to be individually racked for electropolishing and this costs more in labor time.