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Article: Etchants for microscopic examination of cast irons.(Brief Article)(Statistical Data Included)
- Article from:
- Advanced Materials & Processes
- Article date:
- December 1, 1999
CopyrightCOPYRIGHT 1999 ASM International. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Etchants for microscopic examination of cast irons
Etchant Composition Etching technique
Picral 4% picric acid; 96% ethanol Dip etch for 2-10 s
Nital, 5% 5% nitric acid, 95% ethanol (1) Dip etch for 2-10 s
(2) Electrolytic etch(a)
Nital, 2% 2% nitric acid, 98% ethanol Dip etch for 2-10 s
Ferric chloride 10 g ferric chloride,Dip etch for 3-20 s
100 mL water
Mixed acid in 10 mL [HNO.sub.3], 20 mL HF, Dip etch for 10-40 s
glycerol 40 mL glycerol
Etchant Applications
Picral General-purpose etching of all pearlitic gray
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