In order to improve corrosion stability and biocompatibility of titanium
surfaces, hydroxyapatite (Ca10(PO4)6(OH)2, HAP) has been used as coating
material due to the fact that it possess similar chemical composition as bone
tissue. Lignin?s (Lig) usage in medical applications could be interesting
because it could lead to thermal stability, hydrophilicity, biocompatibility
and biodegradability of different materials. Bioceramic hydroxyapatite/lignin
(HAP/Lig) coatings on titanium were obtained from ethanol suspension by
electrophoretic deposition method. The uniform and compact HAP/Lig coatings
were deposited at constant voltage of 60 V for 45 s and sintered at 900?C in
argon atmosphere. The corrosion stability of sintered HAP/Lig coatings in
simulated body fluid (SBF) at 37?C was investigated by open circuit
potential-time measurements and electrochemical impedance spectroscopy (EIS).
The greater values of open circuit potential, as well as EIS results,
indicated improved corrosion resistance and good corrosion stability of
HAP/Lig coatings in simulated body fluid at 37?C .