Electropolish stainless steel 440c

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Jules Lloyd Hammond

See the following article and its references:

Article Electropolishing of surfaces: theory and applications

"Electrolytes used for electropolishing are most often concentrated acid solutions having a high viscosity, such as mixtures of sulphuric acid and phosphoric acid.

Other electropolishing electrolytes reported in the literature include mixtures of perchlorates with acetic anhydride and methanolic solutions of sulphuric acid."

Mehdi Sohrabi

I now use this combination of sulfuric acid and phosphoric acid and a little distilled water and glycerin for the polishing of this alloy, but I am unable to do this.

Thanks for your feedback.

Can you tell the exact mix needed? How many percentage of phosphoric acid and a few percent of sulfuric acid?