| AZ91D镁合金表面复合镀层局部腐蚀现象解析及化学镀Ni-P-Cu的研究 |
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| 引用本文： | 沈波,任玉平,杨中东,裴文利,王继杰,樊占国,秦高梧.AZ91D镁合金表面复合镀层局部腐蚀现象解析及化学镀Ni-P-Cu的研究[J].沈阳航空工业学院学报,2009,26(3):40-44. |
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| 作者姓名： | 沈波 任玉平 杨中东 裴文利 王继杰 樊占国 秦高梧 |
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| 作者单位： | 1. 沈阳航空工业学院材料系,辽宁,沈阳,110136
2. 东北大学材料与冶金学院,辽宁,沈阳,110004 |
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| 摘 要： | 采用SEM-EDX和光学显微镜等分析手段,研究了AZ91D镁合金化学镀Ni-P/电镀Cu/Ni/Cr复合镀层盐雾试验时局部严重腐蚀的原因.研究发现,AZ91D镁合金基体的孑L隙缺陷是由于其在化学镀和电镀过程中,缺陷处未能形成致密镀层而出现凹陷贯穿性的微孔所致.在此基础上,探讨了加入微量Cu的化学镀Ni-P工艺,Cu能显著细化镀层胞状组织尺寸,抑制表面胞状凸起;极化曲线和盐雾测试表明Cu微合金化的Ni-P镀层能明显改善Ni-P化学镀层的耐蚀性能.
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| 关 键 词： | AZ91D镁合金 盐雾试验 极化曲线 局部腐蚀 化学镀 |
Local corrosion of electrodeposited multi-layers of AZ91D magnesium alloy and its processing of electroless plated Ni-P-Cu layers |
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| SHEN Bo,REN Yu-ping,YANG Zhong-dong,PEI Wen-li,WANG Ji-jie,FAN Zhan-guo,QIN Gao-wu.Local corrosion of electrodeposited multi-layers of AZ91D magnesium alloy and its processing of electroless plated Ni-P-Cu layers[J].Journal of Shenyang Institute of Aeronautical Engineering,2009,26(3):40-44. |
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| Authors: | SHEN Bo REN Yu-ping YANG Zhong-dong PEI Wen-li WANG Ji-jie FAN Zhan-guo QIN Gao-wu |
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| Institution: | 1.College of Material Science and Engineering;Shenyang Institute of Aeronautical Engineering;Liaoning Shenyang 110136;2.College of Material and Metallurgy;Northeasten University;Liaoning Shenyang 110004 |
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| Abstract: | The local corrosion mechanism in the AZ91D magnesium alloy surface-modified by electroless plating/electrodeposition coatings of multi-layers of Ni/Cu/Cr and followed by salt fog spraying at room temperature,has been studied by using scanning electron microscopy with energy dispersive spectropy of X-ray(SEM-EDS) and optical microscopy.The results show that the initial electroless plated Ni-P coating could not been well deposited in the original alloy surface micro-holes(about 20 m in diameter),and results i... |
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| Keywords: | Nj-P-Cu |
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