NDT - Nital Etch
NDT - Nital Etch
(OP)
Is there a titration to verify the nitric concentration in a nitric - ethanol solution?
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RE: NDT - Nital Etch
I don't know of a test.
You don't want to be using old solution anyway, it will have too much water in it from moisture in the air.
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Plymouth Tube
RE: NDT - Nital Etch
RE: NDT - Nital Etch
But if you really had to, UV Spectro is a pretty standard method for determination of nitrate in water (probably can be extended to ethanol as the medium instead).
Acid/base titration would be appropriate - nitrate concentration would be save as H+ conc.
RE: NDT - Nital Etch
RE: NDT - Nital Etch
Try documentation for A-A-59105 & MIL-STD-867.
Here's a link that discusses similar issue:
http://www.finishing.com/254/68.shtml
Hope that helps.
Terry
RE: NDT - Nital Etch
RE: NDT - Nital Etch
Use reagent grade materials and store in a dark bottle and allocating a small ammount for each job and dump the unused portion.
I rinse with demineralized water, dry with reagent grade acetone and completely dry the sample with a heat gun, which in our case was doggie hair dryer over 50 yrs old.
RE: NDT - Nital Etch
RE: NDT - Nital Etch