Pb and most alloys - General macrostructure

Pb and most alloys - General macrostructure

Material Name: Pb and most alloys
Recipe No.: 9573
Primary Chemical Element in Material: Pb
Sample Type: Bulk
Uses: General macrostructure
Etchant Name: None
Type (Macro/Micro): Macro
Etching Method: Chemical
Etchant (Electrolyte) Composition: Solution a: 250 ml H2O, 140 ml HNO3, 100 ml molybdic acid. Solution b: 960 ml H2O, 400 ml HNO3. Solution c: 100 ml glacial acetic acid.
Procedure (Condition): Add solution a in solution b (never solution b to solution a) and let precipitate, then add solution c. Swab sample until desired contrast is obtained. Alternate method to make etch: dissolve molybdic acid in water, add ammonium hydroxide, filter, then add solution b only.
Note: No data
Reference: Vander Voort, Metallography Principles and Practice, McGraw-Hill, Inc., 1984, p. 521.