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Epsilon phase in Pb-Sb-Sn alloys - Chemical etching

Material Name: Pb-Sb-Sn alloys
Recipe No.: 9209
Primary Chemical Element in Material: Pb
Sample Type: Bulk
Uses: General microstructure
Etchant Name: None
Type (Macro/Micro): Micro
Etching Method: Chemical
Etchant (Electrolyte) Composition: 50 ml lactic acid 90%, 10 ml nitric acid 65%, 7 ml hydrogen peroxide 30%.
Procedure (Condition): Seconds to minutes, swabbing. Alpha etches befere episilon.
Note: Epsilon phase in Pb-Sb-Sn alloys.
Reference: G. Petzow, Metallographic Etching, 2nd Edition, ASM International, USA, 1999.