Electrochemical properties of TiNCrN-coated bipolar plates in polymer electrolyte membrane fuel cell environment

被引：27
作者：
Nam, N. D. [1 ]
Han, J. H. [1 ]
Kim, J. G. [1 ]
Tai, P. H. [2 ]
Yoon, D. H. [1 ,2 ]
机构：
[1] Sungkyunkwan Univ, Dept Adv Mat Sci & Engn, Suwon 440746, South Korea
[2] Sungkyunkwan Univ, Adv Inst Nanotechnol, Suwon 440746, South Korea
来源：
THIN SOLID FILMS | 2010年 / 518卷 / 22期
关键词：
PEMFC; Bipolar plate; Multi-coating; Corrosion resistance; Conductivity; STAINLESS-STEEL; COST; BEHAVIOR; FILMS;
D O I：
10.1016/j.tsf.2010.03.046
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The overall performance of multilayered TiN/CrN coatings suggests that they may show improved corrosion resistance compared to a single layer. Three TiN/CrN coatings deposited on 316L stainless steel substrates by radio frequency magnetron sputtering were evaluated under potentiodynamic, potentiostatic and electrochemical impedance spectroscopy tests. Electrochemical impedance spectroscopy was performed for 168 h in a corrosive environment at 70 degrees C to determine the coating performance at +600 mV(SCE) under the simulated cathodic conditions in a polymer electrolyte membrane fuel cell. The results showed high protective efficiency and charge transfer resistance with decreasing inner layer thickness. X-ray diffraction confirmed the formation of a TiN/CrN(111) preferred orientation along with TiN/CrN (200) at thinner TiN layer. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：6598 / 6603
页数：6
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