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Pure Pb, Pb-Sn and Pb-Ca alloys - Chemical etching

Material Name: Pure Pb, Pb-Sn and Pb-Ca alloys
Recipe No.: 10703
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: 75 ml acetic acid, 25 ml H2O2 (30%).
Procedure (Condition): Immerse sample 5 to 15 min depending on alloy. After etching, dip in conc. HNO3, then cold water, dry. (60-30 and 100-10 ratios also used).
Note: Popular etch for pure Pb, Pb-Sn and Pb-Ca alloys. Worner.
Reference: Vander Voort, Metallography Principles and Practice, McGraw-Hill, Inc., 1984, p. 656.