Cu, brass (high Zn content) - Attack polishing

Cu, brass (high Zn content) - Attack polishing

Material Name: Cu, brass (high Zn content)
Recipe No.: 9719
Primary Chemical Element in Material: Cu
Sample Type: Bulk
Uses: Polishing
Etchant Name: None
Type (Macro/Micro): Micro
Etching Method: Attack polishing
Etchant (Electrolyte) Composition: Aq. ammonium persulfate: 10-15 g/l (for copper), 15-30 g/l (for brass), MgO abrasive.
Procedure (Condition): Insert plastic between cloth and wheel to prevent pitting. Use skid-polish technique.
Note: Good for Al or Zn also. Samuels.
Reference: Vander Voort, Metallography Principles and Practice, McGraw-Hill, Inc., 1984, p. 544.