Cb. In et al., CORROSION BEHAVIOR OF TIN FILMS OBTAINED BY PLASMA-ASSISTED CHEMICAL-VAPOR-DEPOSITION, Journal of Materials Science, 29(7), 1994, pp. 1818-1824
Titanium nitride (TiN) coatings with a dense structure were prepared o
n high-speed steel by plasma-assisted chemical vapour deposition (PACV
D). The electrochemical polarization measurement of TiN coating was co
mpared with that of the uncoated substrate. It was found that the TIN
coating had a higher corrosion potential, and a lower corrosion rate (
current density), about three orders of magnitude less than for the st
eel substrate. The major corrosion mechanism of TiN was pitting corros
ion through surface defects and/or open pores. The number and size of
pits decreased with the chlorine content of the film. The TiN coating
deposited by PACVD, regardless of the amount of residual chlorine, pro
ved to be a good anticorrosion coating on a steel substrate.