Iron and steels - Chemical etching

Material Name: Iron and steels
Recipe No.: 10604
Primary Chemical Element in Material: Fe
Sample Type: Bulk
Uses: General microstructure
Etchant Name: None
Type (Macro/Micro): Micro
Etching Method: Chemical
Etchant (Electrolyte) Composition: 20 g K3Fe(CN)6, 10 g KOH, 100 ml distilled water.
Procedure (Condition): Use boiling. Chromium carbides and tungstides darkened in about 20 s, cemmentite after about 5 min.
Note: Selective carbide etchant. Daeves.
Reference: Vander Voort, Metallography Principles and Practice, McGraw-Hill, Inc., 1984, p. 646.
















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