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Indexed by:期刊论文

Date of Publication:2009-01-01

Journal:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

Included Journals:SCIE、EI

Volume:34

Issue:1

Page Number:453-458

ISSN No.:0360-3199

Key Words:Metal bipolar plate; Pulsed bias arc ion plating; Flow rate of N(2)

Abstract:Pulsed bias arc ion plating was used to form Cr-nitride films on stainless steel as bipolar plate of proton exchange membrane fuel cell. Surface micrograph, film thickness, film composition, corrosion resistance, interfacial conductivity and contact angle with water of the sample obtained at the optimal flow rate of N(2) were investigated. The atomic ratio of Cr to N was close to 2:1 and the CrN phase with crystal planes of (111), (200), (220) and (311) was found in the film. Potentiodynamic and potentiostatic tests showed that the corrosion resistance of the bipolar plate sample was greatly enhanced. The contact resistance between the bipolar plate sample and Toray carbon paper was about two orders of magnitude lower than that of 316L stainless steel. The contact angle of the sample with water was 95 degrees, which is beneficial for water management in fuel cells. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.