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Annealed stainless steel, first use NG-9-1 chemistry to remove black skin. If there is oil, use

NZ-B to remove oil to remove oil → wash → electrolytic polishing (this liquid is used directly

for working fluid, Temperature 60 ~ 80 ° C, workpiece hanging anode, current Da: 20 ~ 15A / dm2,

cathode is lead - bismuth alloy (including 8%) Time: 1 ~ 10 minutes, polished until → wash

→ 5 ~ 8% hydrochloric acid Release the film (room temperature: 1 to 3 seconds) → wash with water → blow dry.