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Metallographic Cast Iron Etchants

Metallographic Etching

Cast Iron

CAUTION: Safety is very important when etching. Be sure to wear the appropriate protective clothing and observe all WARNINGS on chemical manufacturersSDS (Safety Data Sheets). Also review COMMENTS Section for each etchant.

Etchant

Conc.

Conditions

Comments

Nital
Ethanol
Nitric acid

100 ml
1-10 ml

Seconds to minutes

Do not exceed 10% nitric acid -explosive


Metallographic micrograph of etched nodular cast iron
Cast Iron, 2% Nital,, 100X (DIC)

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