| AZ91D镁合金的均一化前处理与化学镀Ni-P |
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| 引用本文： | 孙灿,;郭兴伍,;王少华,;郭嘉成,;丁文江.AZ91D镁合金的均一化前处理与化学镀Ni-P[J].中国有色金属学会会刊,2014,24(12):3825-3833. |
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| 作者姓名： | 孙灿 ;郭兴伍 ;王少华 ;郭嘉成 ;丁文江 |
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| 作者单位： | [1]上海交通大学轻合金精密成型国家工程研究中心,上海200240; [2]上海交通大学金属基复合材料国家重点实验室,上海200240 |
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| 基金项目： | Project（51371116）supported by the National Natural Science Foundation of China; Project（2009AA033501）supported by the Ministry of Science and Technology,China |
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| 摘 要： | 采用新型环保的均一化前处理工艺在AZ91D镁合金表面制备了化学镀Ni-P镀层。研究了前处理过程中AZ91D基体微观形貌、镀层沉积过程、成分和相结构。研究结果表明：基体表面的β相在前处理过程中被选择性去除,表面组织得到均一化,从而获得均匀致密的浸Zn层。Ni-P颗粒均匀形核生长,并最终形成致密的镀层。镀层具有优良的耐腐蚀性能。
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| 关 键 词： | AZ91D镁合金 均一化前处理 化学镀Ni-P 腐蚀 |
| 收稿时间： | 17 October 2013 |
Homogenization pretreatment and electroless Ni-P plating on AZ91D magnesium alloy |
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| Can SUN,Xing-wu GUO,Shao-hua WANG,Jia-cheng GUO,Wen-jiang DING.Homogenization pretreatment and electroless Ni-P plating on AZ91D magnesium alloy[J].Transactions of Nonferrous Metals Society of China,2014,24(12):3825-3833. |
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| Authors: | Can SUN Xing-wu GUO Shao-hua WANG Jia-cheng GUO Wen-jiang DING |
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| Affiliation: | Can SUN, Xing-wu GUO, Shao-hua WANG, Jia-cheng GUO, Wen-jiang DING (1. National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China; 2. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China) |
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| Abstract: | Electroless nickel plating on AZ91D substrate with a new and eco-friendly pretreatment process based on tuning an electrochemical homogeneous surface was investigated. The morphology, deposition process, chemical composition and microstructure of Ni-P coating were studied. It is indicated that β phases are selectively removed, producing a microstructural homogeneous surface and the subsequent uniform and compact Zn immersion layer. A defect-free and well adhesive Ni-P coating can be successfully obtained due to its uniform nucleation and growth based on such pretreatment. Potentiodynamic polarization and electrochemical impedance spectroscopy （EIS） tests reveal that Ni-P coating could significantly improve the corrosion resistance of AZ91D substrate. |
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| Keywords: | AZ91D magnesium alloy homogenization pretreatment electroless nickel plating corrosion |
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