Copper and copper alloys-Coppers, brasses, nickel silver; darkening large areas of beta in alpha-beta brass

Material: Copper and copper alloys
Type: Micro
Method: Chemical etching
Etchant (Electrolyte): 10% aqueous solution of copper ammonium chloride plus ammonium hydroxide to neutrality or alkalinity.
Procedure: Immersion. Wash specimen throughly.
Note: Coppers, brasses, nickel silver; darkening large areas of beta in alpha-beta brass.
Source: Metallography, Structures and Phase Diagrams, Metals Handbook, 8th Edition, Vol. 8, ASM (American Society for Metals), Metals Park, Ohio 44079, USA, 1973, p. 131.













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