Investigation of corrosion resistance by coating on implants manufactured by selective laser melting method (SLM)

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Thesis Type: Doctorate

Institution Of The Thesis: Gazi University, Fen Bilimleri Enstitüsü, Turkey

Approval Date: 2024

Thesis Language: Turkish

Student: Demet ÖZAYDIN GÜNDÜZ

Supervisor: Gökhan Küçüktürk

Abstract:

Recently, additive manufacturing techniques have begun to be widely used in implant production. Ti6Al4V alloy is a preferred material for implants due to its low density and high biocompatibility. However, recent research has shown that Ti6Al4V alloy emits long term ions (such as Al and V) that are harmful to health. Therefore, surface modifications, including coating, are required for implants. In this study, electroplating method was used to deposit Zn-doped TiO2 on Ti6Al4V surfaces produced by selective laser melting method. Thus, it is aimed to prevent the release of toxic ions from the Ti6Al4V substrate material. The effects of processing time, added TiO2 amount, pre-anodization process, microstructure of anode materials and corrosion resistance were investigated. Coating hardness and thickness increased with increasing processing time and TiO2 density. It has been observed that adding TiO2 to zinc anode coatings and pre-anodization process causes a decrease in the corrosion rate.

Key Words : Electrodeposition coating; additive manufacturing; Ti6Al4V Grade 5 ELI; TiO2 ceramic; corrosion