Etching 304L
Etching 304L
(OP)
What etchant would you use for 304L. Grain boundaries.
Non electrolytic are preffered.
Non electrolytic are preffered.
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RE: Etching 304L
A Guide to Etching Specialty Alloys for Microstructural Evaluation
at
http://www.cartech.com/techarticles.aspx?id=1450
http://www.welding-advisers.com/
RE: Etching 304L
If you don't want to mess with a power supply just use a battery.
You can try two things, a more concentrated oxalic acid may be good enough. Or a dilute HCl, however this may mess the rest of the micro up too much for you.
I'll check my list when I get back to the office.
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Plymouth Tube
RE: Etching 304L
RE: Etching 304L
I tried Marbles and it work great.
37% HCL and 7 gr CuSO4.
Swab for 5-10sec. Rinse with water.
Thanks for your suggestions. I will try the oxalic.
RE: Etching 304L
RE: Etching 304L
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Plymouth Tube
RE: Etching 304L
Sodium or potassium hydroxide also works well, at concentrations from 10 to 40%. Just beware of the impressive heat of solution that is generated when you mix it with water.
Radio Shack sells a variable voltage charger that is good enough for much electrolytic etching work. Also you don't need lab grade water - I have always used distilled water at the grocery store.