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Al and Al alloys - Chemical etching

Material Name: Al and Al alloys
Recipe No.: 10274
Primary Chemical Element in Material: Al
Sample Type: Bulk
Uses: General microstructure
Etchant Name: None
Type (Macro/Micro): Micro
Etching Method: Chemical
Etchant (Electrolyte) Composition: 12.5 ml HNO3, 2.5 ml HF, 85 ml distilled water.
Procedure (Condition): No data
Note: General purpose immersion etch.
Reference: Vander Voort, Metallography Principles and Practice, McGraw-Hill, Inc., 1984, p. 611.