Fig. 15.

In vivo degradation behavior of Zn-based implants: (a) cross-sectional changes of Zn implant after 1.5, 3, 4.5 and 6 months in the abdominal aorta of rats, (b) CPR rate of implanted Zn wires as a function of exposure time, (c) micro-CT images of Zn stents after 0, 1, 6 and 12 months of implantation, (d) volume loss of Zn stent at different exposure duration, (e) SEM images of corrosion products formed on Zn implant after 1, 3, 6 and 12 months implantation, (f) elemental compositions of corrosion products (at. %) in inner and outer corrosion layers formed after 1, 3, 6, and 12 months implantation, (g) Reduction of cross-sectional area in Zn implant after different exposure time, and (h) energy dispersive X-ray (EDX) elemental maps showing the variation in cross-sectional area of corroded Zn wires. (Reproduced with permission from Refs. [78,90,283]).