Investigating Commercial pure titanium corrosion behavior and a few other characteristics after being coated with a chitosan-hydroxyapatite nanoparticle mixture in a lab experiment

Abstract

Introduction: Metals like titanium and its alloys are frequently used in the construction of medical equipment like dental and orthopedic implants. However, the presence of blood and other bodily fluids in the immediate surroundings may cause corrosion to this implant.
Materials and Methods: The preparation of circular discs of commercially pure titanium (Cp-Ti) measuring 10mm in diameter and 2.5mm in thickness. To precipitate the coating layer, Ti samples have been immersed in a solution of Hydroxyapatite (HA) and chitosan for 90 minutes on a lowspeed stirrer. Samples were taken out and dried in the air as the initial coating step, and then they were immersed in the mixture once more for 15 minutes before being taken out and dried in a hot air oven (200 °C).
Results: The results of coated titanium samples have demonstrated diverse surface features, with the present roughness connected with the appearance of a crystal pool and irregular accumulations of small, spherical-like grains. Thickness measurement found that the average thickness readings were 60 um. The Energy dispersive x ray studies revealed the presence of ions that made up the HA. The open circuit potential (OCP) corrosion test and ANOVA test revealed that coating with hydroxyapatite and chitosan significantly reduces the corrosion rate.
Conclusions: Coating titanium implants with HA or chitosan will, respectively, speed up and slow down the pace of osseointegration and corrosion.