Abstract:
The main aim of this study is to evaluate corrosion and biocompatibility behavior of thermal spray
hydroxyapatite (HA) and hydroxyapatite/titania bond (HA/TiO2)-coated 316L stainless steel (316L SS).
In HA/TiO2 coatings, TiO2 was used as a bond coat between HA top coat and 316L SS substrate. The
coatings were characterized by x-ray diffraction and scanning electron microscopy/energy dispersive
spectroscopy, and corrosion resistance determined for the uncoated substrate and the two coatings. The
biological behavior was investigated by the cell culture studies using osteosarcoma cell line KHOS-NP
(R-970-5). The corrosion resistance of the steel was found to increase after the deposition of the HA and
HA/TiO2 bond coatings. Both HA, as well as, HA/TiO2 coatings exhibit excellent bond strength of 49
and 47 MPa, respectively. The cell culture studies showed that HA-coated 316L SS specimens appeared
more biocompatible than the uncoated and HA/TiO2-coated 316L SS specimens.
