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Pb and Pb alloys - Electrolytic polishing

Material Name: Pb and Pb alloys
Recipe No.: 9958
Primary Chemical Element in Material: Pb
Sample Type: Bulk
Uses: Polishing
Etchant Name: None
Type (Macro/Micro): Micro
Etching Method: Electrolytic polishing
Etchant (Electrolyte) Composition: 375 ml H3PO4, 625 ml ethanol.
Procedure (Condition): Current density: 4.5-5 A/cm2, voltage dc: 1-3 V, temperature: room temperature, time: 10 min.
Note: Current density drops to 0.5 A/dm2 as polishing progresses. When an anode film forms, wash it off quickly to prevent pitting. Inadequate for polarized-light studies. Jacquet.
Reference: Vander Voort, Metallography Principles and Practice, McGraw-Hill, Inc., 1984, p. 582.