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Dissolution of Inconel 617/Haynes 230

rams210405
in Chemistry

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I am trying to dissolve the nickel-based alloys Inconel 617 and Haynes 230 in order to analyze the precipitates with XRD. I already tried the Berzelius solution which is 47.7 g of copper (II) chloride, 41.7 g of potassium chloride, 2.9 g of tartaric acid, 275 ml of distilled water, and 22.4 ml of hydrochloric acid. While this worked for several steels it had almost no effect on the nickel alloys. If you have any ideas on what might work please help!

Maybe aqua regia or hot nitric acid...

Nickel itself isn't the worst. Inconel contains 20...24% of Chromium to make it corrosion-resistent through a CrO2 layer.

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