Electrochemical Behavior and Hydrophobic Properties of CrN and CrNiN Coatings in Simulated Proton Exchange Membrane Fuel Cell Environment

JIN Jie; HAN Sui-wu; AN Teng; MA Jun-jie; ZHANG Wei

doi:10.11868/j.issn.1001-4381.2016.10.005

Cailiao gongcheng (Oct 2016)

Electrochemical Behavior and Hydrophobic Properties of CrN and CrNiN Coatings in Simulated Proton Exchange Membrane Fuel Cell Environment

JIN Jie,
HAN Sui-wu,
AN Teng,
MA Jun-jie,
ZHANG Wei

Affiliations

JIN Jie: School of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
HAN Sui-wu: School of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
AN Teng: School of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
MA Jun-jie: School of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
ZHANG Wei: School of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China

DOI: https://doi.org/10.11868/j.issn.1001-4381.2016.10.005
Journal volume & issue: Vol. 44, no. 10
pp. 33 – 40

Abstract

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The CrN and CrNiN coatings were prepared on the surface of 304 stainless steel by closed field unbalanced magnetron sputtering.X ray diffraction and field emission scanning electron microscopy were used to characterize the structure and morphology of the coatings.The electrochemical corrosion properties under the simulated proton exchange membrane fuel cell(PEMFC) environment, interfacial contact resistance and hydrophobic properties of the two kinds of different coatings were investigated by electrochemical methods,contact resistance test and hydrophobic test,respectively.The results indicate that CrN coating mainly consists of CrN and Cr2N phase,CrN and Cr2N phases in the CrNiN coating are less compared to CrN film, and Ni exist as element in CrNiN coating; dynamic polarization tests show the coating is of better corrosion resistance,whereas the corrosion resistance of CrNiN coating is worse than that of CrN coating,constant potential polarization test shows the corrosion current density of CrN and CrNiN coatings are equivalent; CrN and CrNiN coatings significantly reduce the interfacial contact resistance of the 304 stainless steel,among which CrN coating has the smallest contact resistance; and CrNiN coating which has better hydrophobicity than that of CrN coating is more beneficial for the water management in proton exchange membrane fuel cell.

Published in Cailiao gongcheng

ISSN: 1001-4381 (Print)
Publisher: Journal of Materials Engineering
Country of publisher: China
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: http://jme.biam.ac.cn/CN/1001-4381/home.shtml

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