Electrochemical corrosion behaviour of hydroxyapatite-glass-titanium composite.
Electrochemical corrosion behaviour of hydroxyapatite-glass-titanium composite.
复制标题
羟基磷灰石-玻璃-钛复合材料的电化学腐蚀行为。
DOI：
10.1016/0142-9612(91)90201-k
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发表时间：
1991
期刊：
影响因子：
14
通讯作者：
S. Maruno
中科院分区：
文献类型：
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作者：
Seiji Ban;Jiro Hasegawa;S. Maruno
为了确定含羟基磷灰石（HAj）的玻璃在体内条件下是否会表现出所需的稳定性和活性，通过阳极极化测量来评估HA-玻璃-钛复合材料在模拟体液、0.001nHCl溶液、0.1mNaCl溶液、0.1%白蛋白溶液和0.1%纤维蛋白原溶液中的电化学腐蚀行为。恒电位阳极极化测量从每个静止电位到+2 Vversuss.c.e.进行。以1 mV/s的速率增加。纯钛在HCl溶液中的阳极极化曲线呈现典型的钝化腐蚀行为。击穿电位在HCl溶液中为+1.4V，在其它溶液中为+1.2V。玻璃涂层试样显示出极低的电流密度，小于0.001 μA/cm 2，从静止电位到约+1.8 V，并且显示出电流密度在+1.8 V以上略微增加。HA-玻璃-Ti复合材料的极化曲线与Ti和玻璃涂层试样的极化曲线完全不同。50- 90%HA-玻璃-Ti复合材料的电流密度在静息电位（约-0.5 V）附近从小于0.001急剧增加到10 μA/cm 2，并继续略微上升至+2 V。在NaCl溶液中添加蛋白质对Ti和HA-玻璃-Ti复合材料的阳极极化曲线几乎没有影响。
To determine whether hydroxyapatite(HAj)-containing glass would exhibit the desired stability and activity underin vivoconditions, electrochemical corrosion behaviour of HA-glass-titanium composites was estimated by anodic polarization measurement in a simulated body fluid, 0.001nHCI solution, 0.1mNaCl solution, 0.1% albumin solution, and 0.1% fibrinogen solution. Potentiostatic anodic polarization measurements were made from each rest potential to +2 Vversuss.c.e. with an increasing rate of 1 mV/s. Anodic polarization curves for pure titanium provided typical passive corrosion behaviour in HCl solution. The breakdown potentials were +1.4 V in HCl solution and +1.2 V in other solutions. The glass-coated specimens showed extremely low current density, less than 0.001 μA/cm2, from rest potential to about +1.8 V, and showed a slight increase in current density over +1.8 V. The polarization curves for the HA-glass-Ti composites were quite different from those for Ti and the glass-coated specimens. The current density for 50–90% HA -glass-Ti composites increased drastically from less than 0.001 to 10 μA/cm2around rest potential (about −0.5 V), and continued to rise slightly up to +2 V. Addition of protein in NaCl solution exhibited little effect on anodic polarization curves for Ti and HA-glass-Ti composites.
DOI：
10.1002/jbm.820231305
发表时间：
1989-04-01
期刊：
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH-APPLIED BIOMATERIALS
影响因子：
--
作者：
BLUMENTHAL, NC;COSMA, V
通讯作者：
COSMA, V