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| Electric Conductivity and Corrosion Resistance of Amorphous Carbon Films Prepared by Direct Current Magnetron Sputtering on 304 Stainless Steel |
Haifeng ZHANG1,2,Dong ZHANG2,Xiaowei LI2,Congda LU1,Peiling KE2,Aiying WANG2,**( ) |
1. College of mechanical engineering, Zhejiang University of Technology, Hangzhou 310004, China
2. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China |
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Cite this article:
Haifeng ZHANG,Dong ZHANG,Xiaowei LI,Congda LU,Peiling KE,Aiying WANG. Electric Conductivity and Corrosion Resistance of Amorphous Carbon Films Prepared by Direct Current Magnetron Sputtering on 304 Stainless Steel. Chinese Journal of Materials Research, 2015, 29(10): 751-756.
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Abstract The conductive amorphous carbon films were deposited on the 304SS by conventional direct current magnetron sputtering. The effect of substrate bias on the microstructure and property of amorphous carbon films were mainly investigated. The results show that the electrical conductivity and corrosion resistance are improved significantly for the carbon films coated stainless steel in comparison to the untreated ones. Specifically, when the substrate bias was -200 V the contact resistance was about 16.65 mΩcm2, which may be ascribed to the highest fraction of sp2 bonds under the normal compacting force of the fuel cells at 1.5 MPa. The corrosion potential of the carbon films coated stainless steel significantly increased in the simulated PEM fuel cells environment, while the corrosion current density obviously decreased, especially when the bias was -200 V the carbon film performs the best corrosion resistance, which may be attributed to its best compactness, for this case the corrosion current density is 1.22×10-8 A/cm2 and the corrosion potential is 0.25 V.
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Received: 14 January 2015
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| Fund: *Supported by National Nature Science Foundation of China Nos. 51175472 & 51522106, Ningbo Municipal Natural Science Foundation No. 2015A610083, and Ningbo Municipal Key Technologies R&D Program No. 2014B10032. |
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