Electrolytic Deposition of Calcium Phosphates Films on Nitinol Stents
Calcium phosphates films were deposited onto pipes and stents of nitinol alloys by an electrolytic deposition (ELD) method. Monocalcium phosphate (Ca (H2PO4)2·H2O) solutions were used as the electrolyte, and electric depositions were carried out at the constant cathode current of 1.59 mA/cm2 at 65°C for 60 min. From the deposition on nitinol pipes, deposition rates were changed in 15 minutes and the precipitates were identified to be octacalcium phosphate (Ca8H2(PO4)6·5H2O) and dicalcium phosphate anhydrous (CaHPO4). The electrolytic depositions on the nitinol alloys were useful for the formation of calcium phosphates films on the complex shape of stents.
Kunio Ishikawa and Yukihide Iwamoto
D. Kondo et al., "Electrolytic Deposition of Calcium Phosphates Films on Nitinol Stents", Key Engineering Materials, Vols. 529-530, pp. 243-246, 2013