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Al and Al alloys - Electrolytic polishing

Material Name: Al and Al alloys
Recipe No.: 9882
Primary Chemical Element in Material: Al
Sample Type: Bulk
Uses: Polishing
Etchant Name: None
Type (Macro/Micro): Micro
Etching Method: Electrolytic polishing
Etchant (Electrolyte) Composition: 62 ml perchloric acid, 700 ml ethanol, 100 ml butyl cellosolve, 137 ml distilled water.
Procedure (Condition): Current density: 3.85 A/cm2, time: 20 s.
Note: Mix ethanol and water, add perchloric cerefully. Immediately before use, add butyl cellosolve. Pump electrolyte. For Al and Al-Al3Ni alloys. Lemskey and coworkers.
Reference: Vander Voort, Metallography Principles and Practice, McGraw-Hill, Inc., 1984, p. 563.