Hello everyone. I try to electropolish Ni-Cr samples for TEM. I use a mixture of acetic and prechloric acid (90-10%). Temperature is about 25-30°C. I made the CVC, but the chart hasn’t any plateau. The inflection point is about 8-9V. But during electropolishing at this voltage, a sample is partially oxidized, but pitting is observed at some part of the sample. There is also a high gloss area.
Can you recommend something?
G Dan Sathiaraj
Try to do with 15 V. Temperature arnd 0-5 degree. Keep ur solution in freezer and give a try.
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