| 纳米颗粒增强Ni基复合镀渗层的腐蚀与 |
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| 引用本文： | 徐 江,卓城之,韩德忠,刘林林.纳米颗粒增强Ni基复合镀渗层的腐蚀与[J].稀有金属材料与工程,2010,39(2):318-324. |
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| 作者姓名： | 徐 江 卓城之 韩德忠 刘林林 |
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| 作者单位： | 1. 南京航空航天大学,江苏,南京,210016
2. 南京索沃新材料科技有限公司,江苏,南京210061 |
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| 基金项目： | 国家自然科学基金(50704022);;江苏省自然科学基金(BK2007591)资助 |
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| 摘 要： | 采用复合镀渗工艺,对316L不锈钢表面刷镀的两种纳米陶瓷颗粒(非晶纳米SiO2(n-SiO2)和纳米SiC(n-SiC)颗粒)增强的复合镀层进行双辉Ni-Cr-Mo-Cu多元共渗处理,成功地在316L不锈钢表面制备了纳米颗粒增强Ni基合金层。利用XRD、SEM和TEM对两种复合镀渗层的微观组织进行观察,采用极化曲线、电化学阻抗谱(EIS)和冲刷腐蚀试验对两种复合镀渗层的耐蚀性和耐冲蚀性能进行研究。对两种颗粒增强的复合镀渗层的微观组织分析结果表明:在双辉多元共渗工艺(1000℃)条件下,电刷镀含n-SiO2颗粒的复合镀渗层中的SiO2颗粒仍保持非晶态;而电刷镀含n-SiC颗粒的复合镀渗层中的SiC颗粒已完全分解并与基体合金元素发生反应,导致在晶内析出三元硅化物Cr6.5Ni2.5Si和沿晶界析出碳化物Cr23C6。在3.5%NaCl(质量分数,下同)溶液中的电化学腐蚀实验结果表明:SiO2颗粒增强的复合镀渗层存在明显的钝化区,点蚀电位和维钝电流密度与Ni基合金渗层的十分接近,而电刷镀含SiC颗粒增强的复合镀渗层处于活化状态,但其耐蚀性能仍略强于不锈钢;两种复合镀渗层的EIS图谱均呈现单容抗弧特征,与Ni基合金渗...
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| 关 键 词： | Ni基复合镀渗层 纳米颗粒增强 双层辉光 冲刷腐蚀 电刷镀 |
| 收稿时间： | 2009/8/17 0:00:00 |
Microstructure, Corrosion and Erosion-Corrosion Properties of Ni Based Composite Alloying Layer |
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| Xu Jiang,Zhuo Chengzhi,Han Dezhong and Liu Linlin.Microstructure, Corrosion and Erosion-Corrosion Properties of Ni Based Composite Alloying Layer[J].Rare Metal Materials and Engineering,2010,39(2):318-324. |
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| Authors: | Xu Jiang Zhuo Chengzhi Han Dezhong and Liu Linlin |
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| Affiliation: | 1.Nanjing University of Aeronautics and Astronautics;Nanjing 210016;China;2.Nanjing Soar New Material Technology Company;Nanjing 210061;China |
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| Abstract: | Two kinds of nanoparticles reinforced with Ni-based composite alloying layer were prepared by double glow plasma alloying on AISI 316L stainless steel surface,where Ni/amorphous nano-SiO2 and nano-SiC were firstly predeposited by brush plating.The microstructure of the two kinds of nanoparticles was investigated by XRD,SEM and TEM.Their corrosion resistance and erosion-corrosion resistance were analyzed by Tafel Plot,electrochemical impedance spectroscopy(EIS) and erosion-corrosion tests.The results indicat... |
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| Keywords: | Ni-based composite alloying layer nano-particle reinforcement double glow erosion-corrosion electric brush plating |
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