Improving corrosion resistance of Ti-6Al-4V alloy through plasma-assisted PVD deposited nitride coatings
Improving corrosion resistance of Ti-6Al-4V alloy through plasma-assisted PVD deposited nitride coatings
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DOI：
10.1016/j.corsci.2014.07.047
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发表时间：
2014-11
影响因子：
8.3
通讯作者：
V. Oliveira;C. Aguiar;A. M. Vazquez;A. Robin;M. Barboza
中科院分区：
文献类型：
--
作者：
V. Oliveira;C. Aguiar;A. M. Vazquez;A. Robin;M. Barboza
采用等离子体辅助PVD技术在Ti-6Al-4V合金表面沉积TiN和TiAlN/TiAlCrN，以提高其在25℃、60℃和80℃的2M HCl溶液中的耐蚀性。未镀膜的Ti-6Al-4V合金在HCl溶液中表现出明显的活化行为，并发生了活化-钝化转变。TiN和TiAlN/TiAlCrN涂层的Ti-6Al-4V合金呈现钝化行为。涂层的耐蚀性较好，表现为较低的腐蚀电流密度和较高的阻抗。
TiN and TiAlN/TiAlCrN were deposited on the alloy Ti–6Al–4V by means of plasma-assisted PVD technique in order to improve its corrosion resistance in a 2 M HCl solution at 25, 60, and 80 °C. The corrosion behaviour was investigated using open-circuit potential vs. time measurements, potentiodynamic polarization and electrochemical impedance spectroscopy. The uncoated Ti–6Al–4V alloy demonstrated an active behaviour with an active–passive transition in the HCl solution. The TiN and TiAlN/TiAlCrN coated Ti–6Al–4V alloy presented a passive behaviour. The corrosion resistance of the coated alloy was superior, which was evidenced by lower corrosion current densities and higher impedance values.