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Electrochemical behavior of CrN coating for polymer electrolyte membrane fuel cell

Nam, N. D., Park, I. J., Kim, J. G., Tai, P. H. and Yoon, D. H. 2010, Electrochemical behavior of CrN coating for polymer electrolyte membrane fuel cell, Physica scripta T, vol. T139, pp. 014016-014016, doi: 10.1088/0031-8949/2010/T139/014016.

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Title Electrochemical behavior of CrN coating for polymer electrolyte membrane fuel cell
Author(s) Nam, N. D.
Park, I. J.
Kim, J. G.
Tai, P. H.
Yoon, D. H.
Journal name Physica scripta T
Volume number T139
Start page 014016
End page 014016
Total pages 1
Publisher Institute of Physics Publishing
Place of publication Bristol, England
Publication date 2010
ISSN 0031-8949
1402-4896
Keyword(s) AISI 316 stainless steel
bipolar plates
charge transfer resistance
coating performance
corrosive environment
CrN coating
electrochemical behaviors
electrochemical impedance
excellent corrosion resistances
polymer electrolyte membrane fuel cells
potentiodynamics
potentiostatics
preferred orientations
protective efficiency
radio frequencies
rf-Magnetron sputtering
Rf-power
biomechanics
charge transfer
corrosion resistance
electrochemical corrosion
functional materials
ion exchange
magnetron sputtering
mechanical properties
membranes
plastic coatings
polyelectrolytes
polymer films
polymers
proton exchange membrane fuel cells (PEMFC)
stainless steel
x ray diffraction
electrochemical impedance spectroscopy
Summary CrN films on a bipolar plate in polymer electrolyte membrane fuel cells have several advantages owing to their excellent corrosion resistance and mechanical properties. Three CrN samples deposited at various radio frequency (RF) powers by RF magnetron sputtering were evaluated under potentiodynamic, potentiostatic and electrochemical impedance spectroscopy conditions. The electrochemical impedance spectroscopy data were monitored for 168 h in a corrosive environment at 70 °C to determine the coating performance at +600 mVSCE under simulated cathodic conditions in a polymer electrolyte membrane fuel cell. The electrochemical behavior of the coatings increased with decreasing RF power. CrN films on the AISI 316 stainless steel substrate showed high protective efficiency and charge transfer resistance, i.e. increasing corrosion resistance with decreasing RF power. X-ray diffraction confirmed the formation of a CrN(200) preferred orientation at low RF power.
Notes This paper was presented at the ISFM 2009 : 3rd International Symposium on Functional Materials
Language eng
DOI 10.1088/0031-8949/2010/T139/014016
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30047898

Document type: Journal Article
Collection: Institute for Frontier Materials
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