Abstract
The corrosion of implant biomaterials is a well-known critical issue when they are in contact with biological fluids. Therefore, the reactivity of Ti6Al4V implant biomaterials is monitored during immersion in a Hanks’ physiological solution without and with added metabolic compounds, such as lactic acid, hydrogen peroxide, and a mixture of the two. Electrochemical characterization is done by measuring the open circuit potential and electrochemical impedance spectroscopy performed at different intervals of time. Electrochemical results were completed by morphological and compositional analyses as well as X-ray diffraction before and after immersion in these solutions. The results indicate a strong effect from the inflammatory product and the synergistic effect of the metabolic lactic acid and hydrogen peroxide inflammatory compound on the reactivity and corrosion resistance of an implant titanium alloy.
Highlights
Reactivity and corrosion of biomaterials are complex processes and their effects are very important because they could cause various pathological diseases or trauma in the biomedical field
The study highlights the effects of time and the additions of lactic acid as a metabolic product, hydrogen peroxide as an inflammatory product, and these two in a mixed combination on the reactivity, corrosion behavior, and stability of titanium alloy implant materials through electrochemical methods, SEM-EDX surface analysis, and X-ray diffraction patterns
The study elucidates the mechanism and kinetics of titanium alloy implants’ degradation in the harsh conditions of inflammation and the presence of lactic acid acting as a metabolic product, which highlights critical issues regarding the corrosion resistance of the studied implant alloy
Summary
Reactivity and corrosion of biomaterials are complex processes and their effects are very important because they could cause various pathological diseases or trauma in the biomedical field. These phenomena consist of the partial or complete destruction of metallic implants, caused by chemical, electrochemical, or biochemical reactions that take place between the metallic implants and certain factors from the body’s environment [1,2,3,4,5,6,7,8,9,10,11,12]. The favorable biological response is due to the titanium oxide layer that forms spontaneously on its surface [3,4]
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