| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Microstructure and Corrosion Performance of Carbonitriding Layers on Cast Iron by Plasma Electrolytic Carbonitriding |
| PANG Hua1, LV Guo-Hua1, CHEN Huan1, WANG Xin-Quan3, ZHANG Gu-Ling4, YANG Si-Ze1,2 |
| 1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 1001902Fujian Key Laboratory for Plasma and Magnetic Resonance, Department of Aeronautics, School of Physics and Mechanical and Electrical Engineering, Xiamen University, Xiamen 3610053College of Science, Changchun University of Science and Technology, Changchun 1300224College of Science, Central University for Nationalities, Beijing 100081 |
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| Cite this article: |
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PANG Hua, LV Guo-Hua, CHEN Huan et al 2009 Chin. Phys. Lett. 26 086805 |
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Abstract The surface carbonitriding of cast iron is investigated in an aqueous solution of acetamide and glycerin. Microstructure, chemical and phase composition and corrosion performance of the carbonitriding layers are investigated by scanning electron microscopy, energy dispersive spectroscopy and x-ray diffraction, as well as potentiodynamic polarization testing. X-ray diffraction results show that the carbonitriding coatings are composed of martensite, austenite(γ-Fe), Fe2C, Fe3C, Fe5C2, FeN and ε-Fe2-3N. After the plasma electrolytic carbonitriding treatment the corrosion resistance of cast iron is clearly improved compared to the substrate, and the coatings produced at 350V for 30s give the best corrosion resistance.
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| Keywords:
68.55.-a
81.65.Kn
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Received: 01 June 2009
Published: 30 July 2009
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| PACS: |
68.55.-a
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(Thin film structure and morphology)
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81.65.Kn
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(Corrosion protection)
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