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http://dx.doi.org/10.5695/JKISE.2011.44.2.068

A Study on Corrosion Resistance and Electrical Surface Conductivity of an Electrodeposited Ni-W Thin Film  

Park, Je-Sik (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
Jeong, Goo-Jin (Green Energy System Center, Kumoh National Institute of Technology)
Kim, Young-Jun (Advanced Battery Research Center, Korea Electronics Technology Institute)
Kim, Ki-Jae (Advanced Battery Research Center, Korea Electronics Technology Institute)
Lee, Churl-Kyoung (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean institute of surface engineering / v.44, no.2, 2011 , pp. 68-73 More about this Journal
Abstract
A Ni-W thin-film was synthesized by electrodeposition, and its corrosion resistance and electrical surface conductivity were investigated. Amount of tungsten in the Ni-W thin-film increased linearly with current density during the electrodeposition, and crack-free and low-crystalline Ni-21 at.%W coating layer was obtained. Corrosion resistances of the Ni-W thin-films were examined with an anodic polarization method and a storage test in a strong sulfuric acid solution. As a result, the Ni-21 at.%W thin-film exhibited the greatest corrosion resistance, and maintained the electrical surface conductivity even after the severe corrosion test, which could be applicable as a surface treatment for advanced metallic bipolar plates in fuel cell or redox flow battery systems.
Keywords
Ni-W alloy; Electrodeposition; Corrosion; Surface conductivity; Bipolar plate;
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