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Potential of AZ series magnesium alloys for ureteral stent manufacturing
 Trnková, Zuzana ; Buchtík, Martin (referee) ; Doskočil, Leoš (advisor)
This master's thesis focuses on investigating the potential of magnesium alloys AZ31 and AZ91 for the production of ureteral stents. Potentiodynamic polarization (PDP) and electrical impedance spectroscopy (EIS) methods were used for electrochemical testing. Surface and microscopic analysis were conducted using scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). Immersion tests were used to characterize the corrosion solution and surface of AZ31 and AZ91 alloys. Fourier transform infrared spectroscopy (FTIR) with ATR module was used to determine the corrosion products on the surface of the alloys. The results showed that the AZ series alloys have potential for ureteral stent manufacturing, with AZ31 appearing to be more suitable than AZ91 as it provides more stable corrosion protection in the long term and the corrosion products do not form large particles that could lead to undesirable encrustation. Urea has also been shown to have a negligible impact on corrosion of AZ31 and AZ91 at lower concentrations, but at higher concentrations a significant impact on corrosion has been observed (especially in the case of AZ31).
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