Below I given a MS Tube which use on coating on this tube. But I do not know coating element name. How can I know which chemical element of this caoting.
This is a MS tube which is used as condenser .
In order to protect steel parts from corrosion, they are galvanized (coated with zinc) in most cases. In theory, your tube could have a coating other than zinc, but it is extremely unlikely.
Dear Dr. Atik Islam ,
you can make an SEM measurement with an EDAX microprobe to determine the surface chemical part or use the XPS technique, particularly suitable for surface analysis, on small parts of your sample.
If you want to act more manually, you can try a chemical attack of the tube and then determine via Atomic Absorption Spectroscopy (AAS) how the surface coating can be composed but this is a longer and more complex process ...
My best regards, Pierluigi Traverso.
Atik Islam,
Pierluigi Traverso mentioned some very rudimentary and solid techniques to obtain your information. In addition to these excellent answers, you could use any type of spatially resolved elemental analysis technique (SEM or TEM coupled with EDS/EDAX, XPS, µXRF, etc.). Even some other fingerprinting techniques such as µXRD, Raman, FTIR may infer the coating composition from the pattern or spectra.
The important issue is that one must take into account interaction volumes and make sure these do not probe your sample too far, i.e. probe the coating and substrate. This is a VERY common mistake and oversight in all of the routine analysis mentioned above.
Cheers, and good luck!
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