| 镁合金直接化学镀Ni-B镀层的腐蚀电化学行为研究 |
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| 引用本文： | 彭淑合,贾飞,唐毅,王周成.镁合金直接化学镀Ni-B镀层的腐蚀电化学行为研究[J].腐蚀科学与防护技术,2009,21(2):191-193. |
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| 作者姓名： | 彭淑合 贾飞 唐毅 王周成 |
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| 作者单位： | 厦门大学化学化工学院,厦门,361005 |
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| 摘 要： | 研究了镁合金表面化学镀Ni-B合金的电化学行为，采用电化学动电位扫描极化曲线和交流阻抗研究了Ni-B镀层的腐蚀电化学行为，结果表明，Ni-B镀层在3.5%NaCl溶液中具有优良的耐蚀性能.所得Ni-B镀层的自腐蚀电位在－400 mV左右，相对于基体-1460 mV提高了1000 mV，自腐蚀电流密度小于0.7 μA/cm2，相对于基体28.5 μA/cm2降低了近两个数量级，说明Ni-B镀层能够有效地提高AZ91D 镁合金的耐腐蚀性能，使AZ91D镁合金在35%NaCl溶液腐蚀介质中的腐蚀速度明显降低.电化学交流阻抗测试结果符合极化曲线的测量结果，化学镀Ni B镀层后的AZ91D镁合金在3.5％NaCl溶液中的阻抗值相对于基体提高两个数量级，表现为自腐蚀电流降低，阻抗值相应提高.
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| 关 键 词： | 镁合金 化学镀 Ni-B镀层 腐蚀电化学行为 |
| 收稿时间： | 2008-06-25 |
| 修稿时间： | 2008-08-09 |
CORROSION ELECTROCHEMICAL BEHAVIOR OF Ni-B COATING ON MAGNESIUM ALLOY AZ91D PREPARED BY DIRECTLY ELECTROLESS PLATING |
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| PENG Shu-he,JIA Fei,TANG Yi,WANG Zhou-cheng.CORROSION ELECTROCHEMICAL BEHAVIOR OF Ni-B COATING ON MAGNESIUM ALLOY AZ91D PREPARED BY DIRECTLY ELECTROLESS PLATING[J].Corrosion Science and Protection Technology,2009,21(2):191-193. |
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| Authors: | PENG Shu-he JIA Fei TANG Yi WANG Zhou-cheng |
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| Affiliation: | College of Chemistry and Chemical Engineering;Xiamen University;Xiamen 361005 |
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| Abstract: | Corrosion electrochemical behavior of a directly electroless-plated Ni-B coating on magnesium alloy was investigated by means of potentiodynamic and electrochemical impendence spectroscopy(EIS).The results indicated that the corrosion resistance of the coating was excellent in 3.5% sodium chloride solution.The corrosion potential was around -400 mV and the current density was less than 0.5 μA/cm2,which exhibits that the coating can significantly enhance the corrosion resistance of the substrate. |
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| Keywords: | magnesium alloys electroless plating Ni-B coating corrosion electrochemical behavior |
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