Iron-based alloy and nitridation treatment for PEM fuel cell bipolar plates
Abstract
A corrosion resistant electrically conductive component that can be used as a bipolar plate in a PEM fuel cell application is composed of an alloy substrate which has 10-30 wt. % Cr, 0.5 to 7 wt. % V, and base metal being Fe, and a continuous surface layer of chromium nitride and vanadium nitride essentially free of base metal. A oxide layer of chromium vanadium oxide can be disposed between the alloy substrate and the continuous surface nitride layer. A method to prepare the corrosion resistant electrically conductive component involves a two-step nitridization sequence by exposing the alloy to a oxygen containing gas at an elevated temperature, and subsequently exposing the alloy to an oxygen free nitrogen containing gas at an elevated temperature to yield a component where a continuous chromium nitride layer free of iron has formed at the surface.
- Inventors:
-
- Oak Ridge, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1014936
- Patent Number(s):
- 7829194
- Application Number:
- US Patent Application 11/582,034
- Assignee:
- UT-Battelle, LLC (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
- DOE Contract Number:
- AC05-00OR22725
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Brady, Michael P, Yang, Bing, and Maziasz, Philip J. Iron-based alloy and nitridation treatment for PEM fuel cell bipolar plates. United States: N. p., 2010.
Web.
Brady, Michael P, Yang, Bing, & Maziasz, Philip J. Iron-based alloy and nitridation treatment for PEM fuel cell bipolar plates. United States.
Brady, Michael P, Yang, Bing, and Maziasz, Philip J. Tue .
"Iron-based alloy and nitridation treatment for PEM fuel cell bipolar plates". United States. https://www.osti.gov/servlets/purl/1014936.
@article{osti_1014936,
title = {Iron-based alloy and nitridation treatment for PEM fuel cell bipolar plates},
author = {Brady, Michael P and Yang, Bing and Maziasz, Philip J},
abstractNote = {A corrosion resistant electrically conductive component that can be used as a bipolar plate in a PEM fuel cell application is composed of an alloy substrate which has 10-30 wt. % Cr, 0.5 to 7 wt. % V, and base metal being Fe, and a continuous surface layer of chromium nitride and vanadium nitride essentially free of base metal. A oxide layer of chromium vanadium oxide can be disposed between the alloy substrate and the continuous surface nitride layer. A method to prepare the corrosion resistant electrically conductive component involves a two-step nitridization sequence by exposing the alloy to a oxygen containing gas at an elevated temperature, and subsequently exposing the alloy to an oxygen free nitrogen containing gas at an elevated temperature to yield a component where a continuous chromium nitride layer free of iron has formed at the surface.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 09 00:00:00 EST 2010},
month = {Tue Nov 09 00:00:00 EST 2010}
}
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