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| MICROSTRUCTURE AND CORROSION RESISTANCE OF Ta MODIFIED LAYER FORMED BY DOUBLE GLOW PLASMA SURFACE METALLURGY |
| BI Qiang, ZHANG Pingze, HUANG Jun, WEI Dongbo, LI Wei |
| College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics,Nanjing 211106 |
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Abstract Ta modified layer was obtained on Q235 steel by double glow plasma surface metallurgy and its microstructure, composition and corrosion resistance were investigated by XRD, SEM, EDS, polarization curve, electrochemical impedance spectroscopy(EIS) and neutral salt spray test(NSS). The results indicated that the Ta modified layer adhered strongly to substrate and its thickness was about 32μm. Ta element distributed gradiently from the surface to substrate and the modified layer was mainly consisted of α-Ta phase. The results of polarization curves, electrochemical impedance spectroscopy and neutral salt spray test revealed that the Ta modified layer exhibited better corrosion resistance than Q235 steel.
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Received: 29 August 2011
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Corresponding Authors:
BI Qiang
E-mail: moka1021@126.com
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Cite this article:
BI Qiang, ZHANG Pingze, HUANG Jun, WEI Dongbo, LI Wei. MICROSTRUCTURE AND CORROSION RESISTANCE OF Ta MODIFIED LAYER FORMED BY DOUBLE GLOW PLASMA SURFACE METALLURGY. Journal of Chinese Society for Corrosion and protection, 2012, 32(5): 364-368.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2012/V32/I5/364
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