摘要
镁及其合金作为生物医用材料具有明显的优势,可以利用其耐蚀性差的特点,发展新型医用可降解镁金属材料.本文选择纯镁为主要研究对象,从杂质含量、加工处理状态等方面研究了两种纯镁在生理盐水中的腐蚀规律,表明降低纯镁中杂质元素的含量和细化晶粒可以提高纯镁在生理盐水中的开路腐蚀电位,减缓腐蚀速率.纯镁的腐蚀速率可以通过调整杂质含量、晶粒细化和固溶处理等方法进行控制,适宜发展成为一类新型的医用可降解金属材料.
Magnesium and its alloys as bio-materials have many obvious advantages. It is possible to develop new type of biodegradable medical magnesium alloys by use of the poor corrosion resistance of magnesium. The effect of impurity content and processing state on the bio-corrosion properties of two pure magnesiums in the physiological saline solution were investigated. The results showed that both the reduction of impurity content and the grain refinement can enhance the open circuit potential of pure magnesium and decrease the corrosion rate in the physiological saline solution. The corrosion rate of pure magnesium can be controlled through ways of changing the impurity content, grain refinement and solution treatment, which makes magnesium suitable as a new type of predeveloped bio-degradable metal material.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第11期1228-1232,共5页
Acta Metallurgica Sinica
关键词
纯镁
生物腐蚀
生物材料
pure magnesium, bio-corrosion, biomaterial