Corrosion resistance of TiN
How corrosion resistant is titanium nitride? Would a thicker TiN film provide better chemical protection, if so, what's the minimum thickness?WY Wong
My information is that TiN coatings are too porous to function for corrosion resistance, so if the substrate is not corrosion resistant it must be plated with a corrosion resistant material before the TiN.
Ted Mooney, P.E.
Pine Beach, New Jersey
TiN has a columnar structure on the substrate. Typical coating thickness is 2-3 microns. Corrosive attacks are usually generated by gassing that would attack the substrate through angstrom level porosity in the coating. The corrosion occurs from the substrate out through the coating. A chrome based PVD coating such as Chrome Carbide or Chrome Nitride would dramatically improve the situation.Blair Woodring
- East Petersburg, Pennsylvania, USA
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