Corrosion behavior and surface characterization of Ti-20Cr alloy in a solution containing fluoride.
Corrosion behavior and surface characterization of Ti-20Cr alloy in a solution containing fluoride.
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DOI：
10.4012/dmj.23.379
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发表时间：
2004-09
影响因子：
2.5
通讯作者：
S. Takemoto;M. Hattori;M. Yoshinari;E. Kawada;K. Asami;Y. Oda
中科院分区：
文献类型：
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作者：
S. Takemoto;M. Hattori;M. Yoshinari;E. Kawada;K. Asami;Y. Oda
本研究的目的是调查实验Ti-20质量% Cr铸造合金在含氟盐溶液中的耐腐蚀性和表面组成之间的相关性。该合金在含氟盐溶液中的耐腐蚀性比商业纯钛更好。然而，随着钛和铬的溶解，这意味着盐溶液中的氟化物对合金有轻微的腐蚀。X射线光电子能谱分析表明，合金的表面组成由钛和铬的氧化物含有氢氧化物。浸泡在含氟盐溶液中，表面氧化膜中的[Ti]/（[Ti] + [Cr]）比值降低，即表面氧化膜变成富铬氧化物。因此，由于富铬氧化膜的形成，合金获得了良好的耐氟化物腐蚀性。
The purpose of this study was to investigate the correlation between corrosion resistance and surface composition of an experimental Ti-20 mass% Cr casting alloy in a saline solution containing fluoride. The alloy had a greater resistance to corrosion in a fluoride-containing saline solution than did commercially pure titanium. However, with confirmed dissolution of titanium and chromium, it meant that the fluoride in the saline solution corroded the alloy slightly. X-ray photoelectron spectroscopy analysis revealed that the surface composition of the alloy consisted of titanium and chromium oxides containing hydroxide. The [Ti]/([Ti] + [Cr]) ratio in the surface oxide film decreased when immersed in fluoride-containing saline solution, that is, the surface oxide film became chromium-rich oxide. Therefore, the alloy obtained good corrosion resistance to fluoride due to formation of a chromium-rich oxide film.