Effects of electroless nickel plating on 441 stainless steel as SOFC interconnect
Resource
Materials Chemistry and Physics, 134(2-3), 670-676
Journal
Materials Chemistry and Physics
Pages
670-676
Date Issued
2012
Date
2012
Author(s)
Shong, Wei-Ja
Liu, Chien-Kuo
Yang, Peng
Abstract
Metal nickel was electrolessly deposited in thickness of approximately 6, 8, and 10 μm on ferritic stainless steel 441. Oxidation behaviour of plated samples was investigated after isothermal ageing at 750°C for 400 h in an air atmosphere. Microstructure examination showed that nickel oxide formed on the surface, (Fe, Ni) 3O 4 spinel layer at the subsurface, and chromite at the oxide scale/steel interface. No chromium species was readily detected on the outer surface. Area specific resistance measurement indicated 2.0, 3.3, and 6.3 mΩ cm 2 for 6, 8, and 10 μm plating layers, respectively, all lower than that of the uncoated case, 28 mΩ cm 2. Results suggested nickel plating of thickness 8 μm would be sufficient for effectively preventing Cr out-diffusion while maintaining a low electric resistivity. © 2012 Elsevier B.V. All rights reserved.
Type
journal article
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