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| Corrosion Behavior of Ni-P Deposit on W-Cu Alloy in NaCl Solution |
| 武汉大学资源与环境工程学院环境工程系 湖北 武汉 |
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Abstract The corrosion behavior of Ni-P deposit on W-Cu alloy in 3.5%(wt%) NaCl solution was tested by the polarization curves and electrochemical impedance spectroscopy (EIS). The results indicate that the passive region is not obvious after immersing in 3.5%(wt%) NaCl solution for 0.5 hour and with the increasing of the immersion time the passive membrane becomes integrated and the passive region is becoming obvious after immersing in 3.5%(wt%) NaCl solution for 2 days. After 6 days the point corrosion potential and passive region become smaller and its anti-corrosion ability is getting lower, but the passive parameter is better than that of W-Cu alloy. The polarization curves after immersing in 3.5%(wt%) NaCl solution for 13 days and 29 days were much the same as the one after 6 days and the corrosion behavior of Ni-P alloy in 3.5%(wt%) NaCl solution becomes stable.
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Received: 05 February 2007
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