Study of Electrochemical Deposition and Degradation of Hydroxyapatite Coated Iron Biomaterials

The sintered iron samples were electrochemically coated with hydroxyapatite (HAp) and manganese-doped HAp (MnHAp) ceramics layer to enhance the biocompatibility of biodegradable material for orthopaedic applications. The influence of electrodeposition duration and concentration of Mn 2+ ions in the electrolyte on the amount, surface appearance, composition and corrosion properties of developed samples was studied. The surface morphology was examined using a scanning electron microscope (SEM) and energy-dispersive X-ray (EDX) analysis. Formation of HAp was proved by time of flight secondary ion mass spectrometry (TOF SIMS). The corrosion behaviour was investigated by means of potenciodynamic polarisation measurements in Hank’s solution. Amount of MnHAp coating was lower than the amount of HAp coating deposited at the identical deposition conditions. Introduction of Mn into the bioceramic film resulted in different surface morphology. The increase in Mn content in MnHAp coating at higher concentration of Mn 2+ ions in deposition bath an