The effect of Pt and Pd alloying additions on the corrosion behavior of titanium in fluoride-containing environments
The effect of Pt and Pd alloying additions on the corrosion behavior of titanium in fluoride-containing environments
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DOI：
10.1016/j.biomaterials.2004.07.022
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发表时间：
2005-05-01
期刊：
影响因子：
14
通讯作者：
Ishikawa, K
中科院分区：
文献类型：
--
作者：
Nakagawa, M;Matono, Y;Ishikawa, K
在本研究中，我们使用阳极极化和腐蚀电位测量方法研究了纯钛、合金Ti-6Al-4V和Ti-6Al-7 Nb以及新实验合金Ti-Pt和Ti-Pd在含氟化物环境中的腐蚀行为。在浸入测试溶液之前和之后，我们使用扫描电子显微镜进行观察。测试溶液包括含有0.2%NaF（对应于905 ppm F）的人工唾液和具有低浓度氧的人工唾液。虽然Ti-Pt和Ti-Pd合金的表面不受含氟化物的酸性环境的影响，但是纯钛、Ti-6Al-4V合金和Ti-6Al-7 Nb合金的表面由于腐蚀而显著粗糙化。当将纯钛、Ti-6Al-4V合金和Ti-6Al-7 Nb合金浸入含有低浓度溶解氧的溶液中时，即使在市售试剂中含有氟化物浓度的情况下，它们的表面也会因腐蚀而受到微观损伤。然而，在这种情况下，新的Ti-Pt和Ti-Pd合金的表面不受影响。这些合金有望作为具有高耐腐蚀性的新型钛合金用于牙科工作。(C)2004爱思唯尔有限公司保留所有权利。
In this study, we examined the corrosion behaviors of pure titanium, the alloys Ti-6Al-4V and Ti-6Al-7Nb, and the new experimental alloys Ti-Pt and Ti-Pd using anodic polarization and corrosion potential measurements in an environment containing fluoride. Before and after immersion in the test solutions, we made observations using a scanning electron microscope. The test solutions included an artificial saliva containing 0.2% NaF (corresponding to 905ppm F) and an artificial saliva with a low concentration of oxygen. Although the surfaces of the Ti-Pt and Ti-Pd alloys were not affected by an acidic environment containing fluoride, the surfaces of the pure titanium, the Ti-6Al-4V alloy, and the Ti-6Al-7Nb alloy were markedly roughened by corrosion. The surfaces of the pure titanium, the Ti-6Al-4V alloy, and the Ti-6Al-7Nb alloy were microscopically damaged by corrosion when they were immersed in the solution containing a low concentration of dissolved oxygen, even with a fluoride concentration included in the commercial dentifrices. In this situation, however, the surfaces of the new Ti-Pt and Ti-Pd alloys were not affected. These alloys are expected to be of use in dental work as new titanium alloys with high corrosion resistances. (C) 2004 Elsevier Ltd. All rights reserved.