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Study of Pitting Corrosion Behavior of Mg-Ca Alloys in Physiological Saline Solution and Its Corrosion Control by Mussel Adhesive Protein

Abstract

镁及镁合金的比强度大、资源丰富、弹性模量和机械性能与人体骨骼相近,且具有较好的生物相容性和降解性,近年来作为生物材料已引起了研究者的广泛关注。然而作为可降解生物材料,限制其临床应用的最主要瓶颈是镁及镁合金在生理环境中降解速度过快且不可控。通过合金化可有效降低镁的腐蚀速度,但并不是所有合金化的镁合金都可用于生物体内,如铝、锌、稀土元素等。铝是一种常用的合金化元素,但铝会导致神经中毒,而人体对锌及稀土等合金化元素的容纳量很有限。钙作为人体大量必需元素和骨骼的主要元素之一,在生物医学上是有利的合金化元素。含钙量为1w.t.%的镁合金腐蚀降解速度较慢,具有更优的机械性能及阻尼性能;而且降解产生的钙离子...Magnesium (Mg) has attracted an extensive attention in development of absorbable biomaterial, due to a number of benefits, including a high strength-to-weight ratio; richness of resource; excellent elastic modulus and mechanical properties which are analogous to those of natural bone; perfect biodegradability and biocompatibility. However, Mg is susceptible to rapid corrosion attack in a aqueous e...学位:工学硕士院系专业:化学化工学院_应用化学学号:2052011115155

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