KCl > CaCl2 > MgCl2，其中Na+和K+比Ca2+和Mg2+更能促進(jìn)鎂合金降解"/>

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金屬陽(yáng)離子對(duì)醫(yī)用鎂合金降解行為的影響規(guī)律
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國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃項(xiàng)目（“973”計(jì)劃）（2012CB619100）；國(guó)家自然科學(xué)基金（51372087, 51072057）


Effect of Different Metal Cations on the Degradation Behavior of Biomedical Magnesium Alloy
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    摘要:

    醫(yī)用鎂合金的降解特性直接影響其在心血管支架和骨替換材料等領(lǐng)域的應(yīng)用。本研究在保持與生理體液氯離子濃度一致的基礎(chǔ)上，選用鎂合金AZ31B分別浸入NaCl溶液，KCl溶液，MgCl2溶液和CaCl2溶液中，對(duì)比研究金屬陽(yáng)離子對(duì)醫(yī)用鎂合金的降解行為影響。通過(guò)動(dòng)電位極化曲線和電化學(xué)阻抗譜測(cè)試分析，發(fā)現(xiàn)鎂合金浸泡在4種氯鹽溶液時(shí)的腐蝕電位、阻抗與其在降解過(guò)程中溶液pH變化、樣品失重變化趨勢(shì)一致，即金屬陽(yáng)離子直接影響醫(yī)用鎂合金的降解特性：NaCl > KCl > CaCl2 > MgCl2，其中Na+和K+比Ca2+和Mg2+更能促進(jìn)鎂合金降解

    Abstract:

    The?degradation?property of biomedical magnesium alloy is the key to determine its application on cardiovascular stents and bone replacement material, etc. In this paper, we discussed the effect of degradation on magnesium alloy with various cations. AZ31B magnesium alloy samples were immersed into NaCl aq., KCl aq., MgCl2 aq. and CaCl2 aq. with the same concentration of Cl- used as body fluid. The potentiodynamic polarization curve (PPC) and electrochemical impedance spectroscopy (EIS) of these magnesium samples were analyzed. Results show that the corrosion potential and impedance have the similar tendency with the pH values and gravimetric curve. Namely, the metal cations affect the degradation property of magnesium alloy directly and the order is NaCl > KCl > CaCl2 > MgCl2. Na+ is superior to other cations in magnesium alloy degradation

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李 英,寧成云,李紅龍,譚幗馨,余遵雄,王曉嵐.金屬陽(yáng)離子對(duì)醫(yī)用鎂合金降解行為的影響規(guī)律[J].稀有金屬材料與工程,2015,44(10):2566~2570.[Li Ying, Ning Chengyun, Li Honglong, Tan Guoxin, Yu Zunxiong, Wang Xiaolan. Effect of Different Metal Cations on the Degradation Behavior of Biomedical Magnesium Alloy[J]. Rare Metal Materials and Engineering,2015,44(10):2566~2570.]
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  • 收稿日期:2014-09-01
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  • 在線發(fā)布日期: 2016-07-13
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