Bioimplants made of metallic materials induce a stress-shielding effect and delayed osteoblast activity during in-vivo experiments. Bioimplants also suffer corrosion, wear and combined effect of corrosion–wear during their service time. Bioimplants made of magnesium alloys result in a negligible stress shielding effect, owing to their similarity with bone’s elastic modulus. However, the soft matrix of the magnesium alloy is susceptible to high-wear rates. In this study, magnesium alloy AZ91D is subjected to the corrosion test (immersion and electrochemical), adhesive wear and simultaneous corrosion–wear test to test the significance of the body fluid in the corrosion–wear rate of the bioimplants. The surface morphology, elemental composition and phase composition of the specimens are characterized using field emission scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction analytic techniques. The results indicate that the simulated-body fluid has a significant effect on the corrosion rate and corrosion–wear rate of the specimens.

中文翻译：

---

镁合金AZ91D在模拟体液中的腐蚀磨损特性研究

由金属材料制成的生物植入物在体内实验中诱导应力屏蔽效应并延迟成骨细胞活性。生物植入物在使用期间还会遭受腐蚀、磨损和腐蚀磨损的综合影响。由镁合金制成的生物植入物由于其与骨骼的弹性模量相似，因此产生的应力屏蔽效应可以忽略不计。然而，镁合金的软基体容易受到高磨损率的影响。在这项研究中，镁合金 AZ91D 进行了腐蚀试验（浸泡和电化学）、粘附磨损和同步腐蚀磨损试验，以测试体液对生物植入物腐蚀磨损率的重要性。使用场发射扫描电子显微镜表征样品的表面形貌、元素组成和相组成，能量色散 X 射线光谱和 X 射线衍射分析技术。结果表明，模拟体液对试样的腐蚀速率和腐蚀磨损速率有显着影响。