Corrosion behaviors of hydroxyapatite coated by electrodeposition method of Ti6Al4V, Ti and AISI 316L SS substrates

Abstract

Electrodeposition method was used to obtain hydroxyapatite (HAP) coatings on Ti6Al4V, Ti and AISI 316L SS substrates. Electrodeposition solution is prepared as Ca(NO3)2 ⋅ 4H2O and (NH4)H2PO4. Additionally, three different pretreatment surface operations (PTSO) (HNO3, anodic polarization, base acid) were applied to the substrates. Surface morphology of HAP coated substrates were characterized by SEM, EDS, XRD. HAP coatings were successfully deposited on Ti6Al4V, AISI 316L SS and Ti substrates Corrosion behavior of uncoated and HAP coated substrates were examined in the Ringer and 0.9% NaCl solutions. The XRD, SEM EDS results supported that HAP formation on the substrates. icor values for all three HAP coated substrates are higher than uncoated substrates This showed that, electrochemical deposi tion HAP coating could not prevent the corrosion. The lowest corrosion rates were founded HNO3 PTSO substrates.