A facile electrodeposition of hydroxyapatite onto borate passivated surgical grade stainless steel

This paper reports a successful electrodeposition method for coating hydroxyapatite (HAP) onto surgical grade stainless steel (SS). Pure HAP coatings could be achieved at −1400 mV vs SCE and the coating resistivity was assessed by potentiodynamic polarization and impedance techniques which showed that HAP coatings deposited onto the borate passivated-SS specimens possess maximum bioresistivity in Ringer’s solution. The coatings were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Atomic force microscopy (AFM). The results have showed that the borate passivation followed by HAP coating performed on 316L SS could enhance the longevity of the alloy in Ringer’s solution.

► Successful deposition of hydroxyapatite on 316L SS by a facile electrolytic Method. ► Improvement of bio-resistivity of the alloy by increasing the time of borate Passivation. ► Evolution of stable, bio-resistive hydroxyapatite coatings on borate passivated 316L SS.