镁在人体模拟液中的腐蚀行为  

Corrosion Behaviour of Pure Magnesium in a Simulated Body Fluid

作　　者：宋光铃[1] 宋诗哲[1] 

机构地区：[1]天津大学材料科学与工程学院

出　　处：《物理化学学报》2006年第10期1222-1226,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金重大项目(50499335)资助

摘　　要：探索了镁在人工人体模拟Hank溶液中的腐蚀行为,发现镁在模拟液中的极化行为与在一般NaCl水溶液中相似.电化学阻抗谱测试结果表明,镁在模拟液中的一些具体反应对腐蚀的贡献可能比在NaCl溶液中的小.在模拟液中,镁腐蚀速度随时间不断变快.这可能与模拟液中可抑制腐蚀的离子的消耗有关.镁腐蚀产生了大量的氢气,并使模拟液碱化.这些结果表明,镁虽然极有希望用作可消溶吸收的人体植入材料,但仍有一些困难需要克服,解决这些困难的关键在于适当地控制其腐蚀速度.The corrosion behaviour of pure magnesium in Hank＇s simulated body fluid （SBF） was investigated. It was found that the polarization of Mg in the SBF solution was similar to that in a NaCl aqueous solution. However, AC impedance analysis suggested that the detailed dissolution steps involved in the corrosion of Mg in the SBF could be different in terms of their rates or contributions to corrosion damage of Mg. Moreover, the corrosion rate of Mg in the SBF solution was found to be increasing with time and significant hydrogen evolution and alkalization of the SBF solution resulting from corrosion of Mg were measured in the study. The results suggested that after some proper measures are taken to retard corrosion reaction, Mg can be successfully employed as a degradable and absorbable implant material.

关 键 词：镁 生物材料 腐蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]