전해도금에 의한 Ni-C 복합층의 내식성 및 표면 전기저항Corrosion and Surface Resistance of Ni-C Composite by Electrodeposition
- Other Titles
- Corrosion and Surface Resistance of Ni-C Composite by Electrodeposition
- Authors
- 박제식; 이성형; 정구진; 이철경
- Issue Date
- 2011
- Publisher
- 한국재료학회
- Keywords
- Ni-C composite; electrodeposition; corrosion; surface resistance; bipolar plate
- Citation
- 한국재료학회지, v.21, no.5, pp 288 - 294
- Pages
- 7
- Journal Title
- 한국재료학회지
- Volume
- 21
- Number
- 5
- Start Page
- 288
- End Page
- 294
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/23105
- ISSN
- 1225-0562
2287-7258
- Abstract
- Simultaneous Ni and C codeposition by electrolysis was investigated with the aim of obtaining better corrosion resistivity and surface conductivity of a metallic bipolar plate for application in fuel cells and redox flow batteries. The carbon content in the Ni-C composite plate fell in a range of 9.2~26.2 at.% as the amount of carbon in the Ni Watt bath and the roughness of the composite were increased. The Ni-C composite with more than 21.6 at.% C content did not show uniformly dispersed carbon. It also displayed micro-sized defects such as cracks and crevices, which result in pitting or crevice corrosion. The corrosion resistance of the Ni-C composite in sulfuric acid is similar with that of pure Ni. Electrochemical test results such as passivation were not satisfactory; however, the Ni-C composite still displayed less than 10−4 A/cm2 passivation current density. Passivation by an anodizing technique could yield better corrosion resistance in the Ni-C composite, approaching that of pure Ni plating. Surface resistivity of pure Ni after passivation was increased by about 8% compared to pure Ni. On the other hand, the surface resistivity of the Ni-C composite with 13 at.% C content was increased by only 1%. It can be confirmed that the metal plate electrodeposited Ni-C composite can be applied as a bipolar plate for fuel cells and redox flow batteries.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.