TY - JOUR
T1 - A
comparative study of the corrosion performance of TiN, Ti(B,N) and
(Ti,Al)N coatings produced by physical vapour deposition methods
AU - Aromaa, Jari
AU - Ronkainen, Helena
AU - Mahiout, Amar
AU - Hannula, Simo-Pekka
AU - Leyland, Adrian
AU - Matthews, Allan
AU - Matthes, Bernd
AU - Broszeit, Erhard
N1 - Project code: KOT6045
PY - 1991
Y1 - 1991
N2 - Thin film coatings produced by
physical vapour deposition methods often exhibit porosity. Local defects
can cause local and rapid corrosion of the base material. The porosity
is difficult to estimate and electrochemical methods are most suitable
for evaluating the corrosion resistance of the coated material. This
paper compares the corrosion resistance of TiN, Ti(B,N), (Ti,Al)N- and
TiB2-coated ASP 23 high speed steel. For the materials studied here the corrosion performance of TiB2-coated
samples was poor. Ti(B,N) coatings obtained by two different methods
were quite similar even though the calculated porosity of the coating
produced by magnetron sputtering was lower than that of coatings
produced by the electron beam technique. These coatings had similar or
slightly better corrosion resistance than (Ti,Al)N coatings with a high
aluminium-to-titanium ratio. (Ti,Al)N coatings with a low
aluminium-to-titanium ratio were better than coatings with a high
aluminium-to-titanium ratio. TiN coatings were better than other types
excluding (Ti,Al)N + AlN layer coatings, which performed best. (Ti,Al)N +
AlN coatings have an insulating layer on top of the coating, which
increases the polarization resistance and decreases the corrosion
current density.
AB - Thin film coatings produced by
physical vapour deposition methods often exhibit porosity. Local defects
can cause local and rapid corrosion of the base material. The porosity
is difficult to estimate and electrochemical methods are most suitable
for evaluating the corrosion resistance of the coated material. This
paper compares the corrosion resistance of TiN, Ti(B,N), (Ti,Al)N- and
TiB2-coated ASP 23 high speed steel. For the materials studied here the corrosion performance of TiB2-coated
samples was poor. Ti(B,N) coatings obtained by two different methods
were quite similar even though the calculated porosity of the coating
produced by magnetron sputtering was lower than that of coatings
produced by the electron beam technique. These coatings had similar or
slightly better corrosion resistance than (Ti,Al)N coatings with a high
aluminium-to-titanium ratio. (Ti,Al)N coatings with a low
aluminium-to-titanium ratio were better than coatings with a high
aluminium-to-titanium ratio. TiN coatings were better than other types
excluding (Ti,Al)N + AlN layer coatings, which performed best. (Ti,Al)N +
AlN coatings have an insulating layer on top of the coating, which
increases the polarization resistance and decreases the corrosion
current density.
U2 - 10.1016/0921-5093(91)90503-F
DO - 10.1016/0921-5093(91)90503-F
M3 - Article
SN - 0921-5093
VL - 140
SP - 722
EP - 726
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -