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| EFFECT OF CERIUM ON THE ELECTRONIC PROPERTY OF PASSIVE FILM FORMED ON Fe-3Cr ALLOY |
| LI Dangguo1;2; FENG Yaorong2; BAI Zhenquan2; ZHENG Maosheng1 |
1.School of Materials Science and Engineering; Xi′an Jiaotong University; Xi＇an 710049;
2.Tubular Goods Research Center; China National Petroleum Corporation; Xi＇an 710065 |
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Abstract The influence of Ce on the semi-conductive property of passive film formed on Fe-3Cr alloy in 1 mol/L NaHCO3+ 0.5 mol/L Na2CO3 buffer solution was studied by using capacitance measurement and electrochemical impedance spectroscopy (EIS). The results showed that Ce can decrease the donor density value of the film formed on substrate alloy in the buffer solution, increase the transfer resistance and film resistance, and decrease the diffusion capability of ions in the film. Moreover, the addition of Ce can enhance the corrosion resistance of substrate alloy in the buffer solution.
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Received: 06 March 2007
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Corresponding Authors:
FENG Yaorong
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