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首页> 外文会议>International Conference on Biomedical Electronics and Devices >Influence of Microstructural Evolution Processed by ECAP on Corrosion Behavior of Pure Magnesium in RPMI-1640 Medium
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Influence of Microstructural Evolution Processed by ECAP on Corrosion Behavior of Pure Magnesium in RPMI-1640 Medium

机译：ECAP处理微观结构演化对RPMI-1640培养基纯镁腐蚀行为的影响

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摘要

Influence of microstructure changes caused by Equal-channel angular pressing (ECAP) process on corrosion behavior of pure magnesium in RPMI-1640 medium was investigated. The grain size of ECAPed samples (30μm) were greatly reduced compared with the grain size of the annealed sample (200μm). Then, the immersion test has been carried out for a certain period of time. It was revealed that mass loss of the ECAPed sample is larger than the as-received sample and the annealed sample. Thus, it could be considered that many crystal defects yielded by ECAP process reduced the corrosion resistance. However, the corrosion resistance has been improved to a certain extent according to reduction of crystal defects through the heat treatment at the recrystallization temperature or lower. In addition, the amount of gas generation of the ECAP sample after immersion test is larger compared with the as-received sample. Therefore, correlation between the amount of gas generated and the mass loss was confirmed. Based on qualitative identification of the elements by Energy Dispersive X-ray Spectrometry (EDS), the corrosion products of the sample surface after the immersion test has been estimated to be a kind of calcium phosphate. These above results have indicated the potential for fabrication of magnesium as bioabsorbable materials.
机译：研究了由等通道角压（ECAP）过程对RPMI-1640培养基纯镁腐蚀行为引起的微观结构变化的影响。与退火样品（200μm）的晶粒尺寸相比，生成样品（30μm）的晶粒尺寸大大降低。然后，已经在一段时间内进行了浸渍试验。揭示了杂皮样品的质量损失大于AS接收的样品和退火样品。因此，可以认为，ECAP工艺产生的许多晶体缺陷降低了耐腐蚀性。然而，根据在重结晶温度或更低的再结晶温度的热处理的情况下，根据晶体缺陷的还原，耐腐蚀性在一定程度上得到改善。另外，与接收的样品相比，浸渍试验比较浸渍试验后的气体产生量。因此，确认产生的气体量与质量损失之间的相关性。基于能量分散X射线光谱（EDS）的质子的定性鉴定，浸渍试验后样品表面的腐蚀产物估计是一种磷酸钙。上述结果表明了镁作为生物可吸收材料制造的可能性。

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