Letter 2028a

How to electropolish Nitinol for microstructure studies

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I am interested about the electropolishing, chemical polishing of nitinol for Microstructure studies using optical microscope and scanning electron microscope.

Ganesh Kumara K.
Mangalore University - Mangalore , Karnataka

hi ganesh

i have been trying my own luck at EP nitinol for optical and electron microscope studies. The idea here is to get a good surface finish which can be done with a fine diamond polish.

for EP a good solution to use would be 20% H2SO4 in methanol. You can connect it as the anode to have faster removal of the oxide and then later try to polish it at the cathode with hydrogen evolution. But you need to do a couple of trials to get your own recipe as it depends on the distance of the electrodes, surface area, current density etc.. I would suggest using low to medium voltages (around 10 V) to get a steady uniform removal. In the meantime if u have had any luck with this please do let me know as i will be interested with your progress. I have a few relevant pubs. if u are interested.

-- Guru

Guruprasad Ramanathan
Case Western Reserve Univ. - Cleveland, OH

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