The objective of the present manuscript was the synthesis of nano hydroxyapatite (n-HA) and its coating on orthopaedic
implant material. The synthesis of n-HA has been achieved using wet chemicalmethod. The elemental
analysis and FTIR spectrumconfirmed the formation of n-HA having a Ca/P ratio of 1.71. The AFMand XRD results
showed the nano dimensions of hydroxyapatite (HA) in the range of 25–35 nm. Scanning electron micrographs
(SEM) showed a flake-like structure of n-HA having sharp edges. The n-HA was further coated on orthopaedic
implantmaterial (titaniumalloy, Ti6Al4V), using the electrostatic spray deposition (EDS) technique. The surface
roughness of Ti alloy increased from 2.34 μm to 2.77 μm after coating with n-HA and corrosion resistance
improved drastically. XRD pattern of n-HA coated Ti alloy however showed broadening of HA associated peak,
reflecting change from crystalline to amorphous phase of n-HA.