Using Taguchi Design to Compare the Corrosion Behavior of Commercial Pure Ti Alloys Coated by Dip and Electrophoretic Deposition with YSZ

Abstract

This study makes experimental evaluations of the corrosion and tip tests of CP-Ti joint (commercial pure Ti) implant alloys coated with YSZ nanoceramic. A Taguchi design of experiments (DOE) strategy was used to create a thin adhesive covering utilizing dip coating and electrophoretic deposition techniques. An L9-type orthogonal Taguchi array determined how dip coating and electrophoretic deposition factors, such as temperature, voltage, YSZ concentration, time, and the degree of pulverizing the Ti alloy substrate, affected the deposition yield. The Ti alloys were coated using the optimal settings for the dip coating and electrophoretic deposition procedures as previously described, utilizing the output data from the thickness and adhesion experiments used to optimize the conditions of dip coating and electrophoretic deposition. The optimal conditions for electrophoretic deposition were 60 volts, 7 minutes, 15% concentration, and 400 grit of grinding. The optimal dip coating conditions were 60°C temperature, 10 seconds, 1% concentration, and 250 grit size of Grinding. High-resolution scanning electron microscopy (FE-SEM) images of the coated alloys were employed for the examination. The microstructure and thickness of the coated surfaces were further examined using optical microscopy and atomic force microscopy (AFM). The corrosion resistance of the best-coated Ti alloys was examined using electrochemical techniques such as polarizing (Tafel) and cyclic polarization in simulated bodily fluid (SBF). Using a tip tester, the coatings' adhesive strength was evaluated. The coated CP-Ti alloys were contrasted using the following corrosion-resistant values: Both coating alloys enhanced corrosion resistance in Ringer's solution at 37°C. However, the coated CP-Ti alloy by electrophoretic deposition corroded less quickly than the CP-Ti alloy by dip coating (3.031×10-3 vs 1.042×10-3 respectively).

Keywords

• dip coating
• electrophoretic deposition
• corrosion
• taguchi
• ysz