Metallographic preparation - Part 7: Final polishing and cleaning (closing remarks)

Preparing your metallographic samples for microscopy at the ASC

[@FrostFire626]

I'm starting a microscopy program at my cement plant and this series was exceptionally informative, thank you.

[@dilankadeegala6306]

These videos were very informative and they help me a lot. Thank you very much !!!

[@NavratanPanwarMMT]

Thank you so much man for wonderful explanation !

[@bludog4657]

Thank you Charlie!! Going for my first interview for a material scientist. Peace!!

[@alexandrfromusnn2229]

Спасибо!

[@muhammadazhariqbal5304]

I have Graphite substrate coated with half micron Mo. I want cross sectional SEM examination . I will appreciate if you please suggest what solvent i should use? water will affect by sample ?

[@CharlieSanabria]

Can you use methanol? There are alumina suspensions that are methanol or ethanol based

[@muhammadazhariqbal5304]

Thanks for reply i appreciate your videos are great help I only have acetone and Ethanol " I have to use it in the same quantity as water in your videos) If used water what possible adversity i can have ( my sample is Iso-molded Graphite coated with Molybdenum )

[@PsychedelicLullaby]

thank you for your great video series. I have some questions for you. I would be very happy if you can help me: I am working with deep drawing steel (low carbon) and i use rotary polishing disc. After i finish grinding at 2500 grid sand paper, i use 1 micrometer alumina suspension and 0.5 micrometer colloidal silica. It is very hard to clear my specimen after the final polishing step. I tried your cleaning method and they are far better now. But some of my specimen are still cant be cleaned that good and sometimes i see some scratches (not so deep) after etching with %2 nital. What do you suggest me to do about it? Some of my specimen are very hard to clean. I suspect it caused by my cold mounting material. what do you suggest me to use? If you can share your e-mail adress with me i can send you their photos. Thank you

[@CharlieSanabria]

Etching always brings out all kinds of nasty stuff. I've never seen a clean sample after chemical etching. Other sources of dirt particles are bubbles in the epoxy. Try vacuum impregnating to reduce the bubbles. Using an ultrasonic bath between polishing steps also helps.

[@bhukya18]

WHY NOT YOU CLEAN WITH ETHANOL AND DRY IT AFTER THAT.