Effect of Glucose Contents on Electrochemical Corrosion Behavior of Ti/ZrO₂ Brazing Joint in SBF

The effect of glucose content on the electrochemical corrosion behavior of the Ti/ZrO 2 brazing joint in simulated body fluid (SBF) was researched by the means of SEM morphologies, electrochemical and XPS analyses. Herein, pitting is observed to be a dominating corrosion model under the investigated glucose content. The pitting corrosion of the joint in 200 mg/dL SBF is minimal. In addition, the joint in 200 mg/dL SBF manifests the best corrosion resistance by electrochemical analyses, which indicates that glucose content has a bidirectional effect on corrosion of the Ti/ZrO 2 brazing joint. Additionally, the corrosion current value and impedance of titanium and brazing joint are close, which indicates that their corrosion resistance is similar. Finally, the OH –, Cl –, Sn 2+ /Sn 4+ and −COOH on the joint surface are found by XPS analysis, and the mechanism of Ti/ZrO 2 brazing joint corrosion is elucidated. The study provides a novel understanding of the corrosion behavior and relevant corrosion mechanism of the Ti/ZrO 2 brazing joint in body fluids with different glucose content.