Corrosion of Ti Metal, Ti-6Al-4V, and Co-Cr-Mo-W Alloys in serum

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The study investigates the corrosion resistance of various titanium and alloy surfaces coated with n-TCP and GO/CS/n-TCP composites in serum. It reveals that the open-circuit potential increases over time, indicating the formation of a protective film, which stabilizes for about an hour. The results suggest that while corrosion resistance improves initially, it declines after 21 days due to partial film decomposition. The coatings enhance passive film growth, but prolonged exposure leads to a dissolution of the protective layer, with the composite coating showing the best resistance.