Magnesium (Mg) alloys are attractive biodegradable implant materials. The degradation products on Mg alloys play a critical role in the stability of the interface between implant and surrounding tissue. In the present study, the effects of dynamic deformation on the interface layer of biomedical Mg-1Zn alloy were investigated using the constant extension rate tensile tests (CERT) coupled with electrochemical impedance spectroscopy (EIS). The deformation of the Mg-1Zn alloy had an adverse influence on the impedance of the surface degradation layer formed in simulated body fluid that only containing inorganic compounds. However, the surface degradation layer with improved corrosion resistance was obtained for the strained samples tested in protein-containing simulated body fluid. The spontaneous or enhanced adsorption of protein into the degradation product led to a flexible and stable hybrid anti-corrosive layer. A relationship between the dynamic deformation of Mg alloy and the impendence of the degradation layer was established, which demonstrates the necessity for in situ characterisation of the evolution of the surface layer under dynamic condition.

镁 (Mg) 合金是有吸引力的可生物降解植入材料。镁合金上的降解产物对植入物与周围组织之间界面的稳定性起着至关重要的作用。在本研究中，使用恒定拉伸速率拉伸试验 (CERT) 结合电化学阻抗谱 (EIS) 研究了动态变形对生物医用 Mg-1Zn 合金界面层的影响。Mg-1Zn合金的变形对仅含无机化合物的模拟体液中形成的表面退化层的阻抗产生不利影响。然而，在含蛋白质的模拟体液中测试的应变样品获得了具有提高的耐腐蚀性的表面降解层。蛋白质自发地或增强地吸附到降解产物中，形成了一个灵活而稳定的混合防腐层。建立了镁合金动态变形与退化层阻抗的关系，证明了动态条件下表层演化的原位表征。