A comparative study on the direct and pulsed current electrodeposition of hydroxyapatite coatings on surgical grade stainless steel

► Hydroxyapatite coating on 316L SS-direct, pulsed current electrodeposition method. ► H2O2 in electrolyte creates OH− ions favoring HAP coating at low current density. ► Phase pure HAP coating with loose-porous morphology is obtained at 2000 ppm H2O2. ► To get adherent coating pulsed method with two pulses off time was carried out. ► Pulsed method at low current-longer off time yields uniform, adherent coating.