Paper Title:
Nanocoatings for SOFC Interconnects - Mitigating Chromium Volatilization and Improving Corrosion Properties
  Abstract

Two important degradation mechanisms in Solid Oxide Fuel Cells (SOFC) are directly related to the metallic interconnects. The formation of volatile chromium oxides from metallic interconnects commonly causes fast degradation in cell performance due to poisoning the cathode. Secondly is the ability of the metallic interconnect to form a thin protective oxide one of the most important lifetime limiting factors for SOFC. Chromium volatilization of various uncoated steels is studied as a function of temperature by a recently developed denuder technique which allows time resolved quantification of volatile chromium species. The inhibition of Cr evaporation by Co thin film coatings (800nm) is investigated; it will be shown that these coatings are more effective than much thicker ceramic coatings that are commonly used for this purpose. In order to increase the lifetime of the metallic components in SOFC nano-coatings of reactive elements (RE) have been investigated as well. The application of such coatings can reduce the corrosion rates substantially and thus increase the lifetime of the fuel cell stack. It will be shown that it is possible to combine the positive effects of RE with the beneficial effects of a Co coating and thus to obtain an interconnect material with low Cr evaporation and increased oxidation resistance.

  Info
Periodical
Edited by
Toshio Maruyama, Masayuki Yoshiba, Kazuya Kurokawa, Yuuzou Kawahara and Nobuo Otsuka
Pages
412-416
DOI
10.4028/www.scientific.net/MSF.696.412
Citation
J. Froitzheim, J.E. Svensson, "Nanocoatings for SOFC Interconnects - Mitigating Chromium Volatilization and Improving Corrosion Properties", Materials Science Forum, Vol. 696, pp. 412-416, 2011
Online since
September 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Si Young Chang, Ye Lim Kim, Byung Heum Song, Jae Ho Lee
Abstract:Ceramic coatings were synthesized on pure Mg and binary Mg-7.1wt%Al alloy by plasma electrolytic oxidation (PEO) technique, and the effect...
767
Authors: D. Ionita, L. Ciohodaru, Mariana Prodana, Ioana Demetrescu
Abstract:The corrosion behavior of titanium alloys and 316L stainless steel has been evaluated and compared with coated materials. The corrosion...
729
Authors: Rui Ling Jia, Hong Ping Duan, Feng Guo, Xi Wei Zhai, Ya Hong Liang
Abstract:Aluminium plate was cladded to magnesium alloy plate by using the explosive welding. The bonding morphology and composition of the explosive...
1248