Electrochemical properties of TiN coatings on 316L stainless steel separator for polymer electrolyte membrane fuel cell
Electrochemical properties of TiN coatings on 316L stainless steel separator for polymer electrolyte membrane fuel cell
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DOI：
10.1016/j.tsf.2007.08.086
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发表时间：
2008-04-01
期刊：
影响因子：
2.1
通讯作者：
Han, J. -G.
中科院分区：
文献类型：
--
作者：
Jeon, W. -S.;Kim, J. -G.;Han, J. -G.
采用闭合场非平衡磁控溅射（CFUBM）法制备了金属双极板用TiN薄膜，并通过调节N-2分压来控制薄膜的性能。采用动电位扫描和电化学阻抗谱（EIS）研究了TiN薄膜在70 ℃、恒电位600 mV（SCE）、1 M H2SO 4 + 2 ppm HF溶液中的腐蚀行为。结果表明，氮气压力的变化对TiN涂层的耐蚀性有影响。0.4 mTorr的N-2分压显示出良好的耐腐蚀性，具有最低的腐蚀电流密度和最高的电荷转移电阻，这是由于低孔隙率。(c)2007 Elsevier B. V.保留所有权利。
TiN films for metallic bipolar plates were synthesized by closed-field unbalanced magnetron sputtering (CFUBM) and the properties were controlled by adjusting the N-2 partial pressure. The corrosion behaviors of TiN films were investigated by potentiodynamic tests and electrochemical impedance spectroscopy (EIS) measurements under the condition of an aerated 1 M H2SO4 + 2 ppm HF solution at 70 degrees C with a constant potential of 600 mV(SCE). The results revealed that the variation of N-2 pressure had an influence on the corrosion resistance of TiN coating. N-2 partial pressure of 0.4 mTorr showed good corrosion resistance with the lowest corrosion current density and the highest charge transfer resistance due to the low porosity. (c) 2007 Elsevier B.V. All rights reserved.