Tóm tắt

Zinc is a biodegradable metal, which exhibits more moderate biodegradability than magnesium and iron, so that rnit has great application potential in the field of biomedical materials. Alloying of zinc and iron may lead to rnproducing a new type of implant material Zn—Fe alloy, which might be able to meet the requirements for a rnmoderate degradation rate. However, due to the huge difference in the melting point between zinc and iron, the rnpreparation of Zn—Fe alloy is quite challenging and hence rarely reported. In this study, we show that Zn—Fe rnalloys can be successfully prepared by electrodeposition technology. The microstructures, composition, de-gradation properties and biocompatibility of the Zn—Fe alloys were systematically studied. The results showed rnthat the content of iron in the alloys ranged from 0 to 8 wt%, depending on the concentration of Fe ions and the rncurrent density. In the alloys, the major's phases were η, δ and Г1, and they were mainly affected by the ion rnconcentration in the electrolyte. In the in vitro immersion tests, the Zn—Fe alloy ZF2–1 showed the highest rnimmersion corrosion rate, while ZF3–1 showed the highest electrochemical corrosion rate. Moreover, we found rnthat the corrosion rates of the alloys were significantly higher than that of the pure Fe. In the in vivo experi-ments, we confirmed that the Zn—Fe alloy possessed good biocompatibility. These results demonstrate that the rnelectrodeposition technology is a good method to prepare Zn—Fe alloys, and the Zn—Fe alloys prepared by this rnmethod are potentially promising materials for biomedical applications.