Which is the most efficient etching solution for nickel based alloys?

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Safwan al-qawabah

5 ml HF, 10 ml glycerol, 85 ml ethanol. Use at room temperature. Etch at 6 – 12 volts.

Abhishek Kumar

Safwan al-qawabah how do you apply the potential?

Mahmood H. M.

dear Abhishek Kumar;

You have to polish the nickel-based alloy sample before the etching process with one of the attached solutions. more details in the attached reference;

https://www.buehler.com/assets/solutions/technotes/Superalloy_Metallography_IH-10-03.pdf

with regard.