what etchant used for white layer thickness and microstructure of inconel 718 please tell me the chemical composition of that etchant with proportion weight..
15 mL HCl
10 mL glycerol
5 mL nitric acid - HNO3
TAKE GREAT CARE WHEN HANDLING THIS SUBSTANCE! Mix fresh for each use - do not store. It is overly aggressive. It can give off Chlorine gas! Do not breathe in the fumes (use under a hood). Discard properly after about 20 minutes.
1 ltr conc. hydrochloric acid, 50 mls of 40% Hydrofluoric Acid (take GREAT CARE WHEN HANDLING THIS SUBSTANCE), 1.25 lts of de-ionised water and 200 mls of Hydrogen Peroxide (100 vols). Cycle time: 30 secs at 25 °C. This solution is highly acidic and you must observe all relevant Health and Safety legislation applicable to your workplace when using this solution.
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