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材料工程  2020, Vol. 48 Issue (8): 163-168    DOI: 10.11868/j.issn.1001-4381.2019.000977
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
AZ91D镁合金表面环境友好直接化学镀镍工艺研究
宿辉1, 刘辉1, 张春波2
1. 黑龙江工程学院 材料与化学工程学院, 哈尔滨 150050;
2. 哈尔滨中飞新技术股份有限公司, 哈尔滨 150060
Process of environmentally-friendly direct electroless nickel plating on AZ91D magnesium alloy surface
SU Hui1, LIU Hui1, ZHANG Chun-bo2
1. College of Materials and Chemical Engineering, Heilongjiang Institute of Technology, Harbin 150050, China;
2. Harbin Zhongfei New Technology Co., Ltd., Harbin 150060, China
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摘要 为高效、环保地提高镁合金的耐蚀、耐磨性能。采用无氟、无铬、无氰、无锌直接化学镀镍方法,在AZ91D镁合金表面制备耐蚀、耐磨沉积层。利用SEM,EDS,XRD及电化学工作站等分别表征沉积前后镁合金表面的形貌、成分、物相及性能。结果表明:主盐-还原剂比例为1:1.4、络合剂浓度为16 g·L-1、pH=7、温度为(85±0.5)℃,镁合金表面沉积层平整、致密,由细小、均匀的胞状组织组成,主要成分为Ni,P,其中Ni含量为85.25%(质量分数),为非晶态结构。镁合金硬度由72HV(基体)提高到285HV,腐蚀电位由-1.524 V(基体)提高到-0.513 V,腐蚀电流密度降低了约3个数量级。基体与沉积层间结合力良好,无起皮、脱落现象,沉积层厚度约为38 μm。
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宿辉
刘辉
张春波
关键词 镁合金直接化学镀AZ91D环境友好耐蚀性    
Abstract:In order to improve the corrosion resistance and wear resistance of magnesium alloy efficiently and environmentally, the corrosion resistant and wear resistant coating were prepared on AZ91D magnesium alloy by direct electroless nickel plating without fluorine, chromium, cyanogen and zinc. The surface morphology, composition, phase and corrosion resistance properties were characterized and compared by SEM,EDS,XRD and electrochemical workstation respectively. The results show that the coatings are smooth and compact, consisting of fine and uniform cellular structure being mainly composed of 85.25%(mass fraction) amorphous Ni and P in the ratio of main salt to reductant is 1:1.4,complexing agent concentration is 16 g·L-1, pH=7 and the temperature is (85±0.5) ℃.The hardness is increased from 72HV of substrate to 285HV. Corrosion potential is enhanced from -1.524 V(substrate) to -0.513 V, meanwhile the corrosion current density is decreased by about 3 orders of magnitude. The cohesion between the substrate and the deposition layer is good without peeling and falling off, and the thickness of the deposition layer is approximately 38 μm.
Key wordsmagnesium alloy    direct electroless plating    AZ91D    environmentally friendly    corrosion resistance
收稿日期: 2019-10-27      出版日期: 2020-08-15
中图分类号:  TG178  
通讯作者: 宿辉(1971-),女,教授,博士,主要从事材料表面技术的研究工作,联系地址:黑龙江省哈尔滨市红旗大街999号黑龙江工程学院(150050),E-mail:xh123456_71@163.com     E-mail: xh123456_71@163.com
引用本文:   
宿辉, 刘辉, 张春波. AZ91D镁合金表面环境友好直接化学镀镍工艺研究[J]. 材料工程, 2020, 48(8): 163-168.
SU Hui, LIU Hui, ZHANG Chun-bo. Process of environmentally-friendly direct electroless nickel plating on AZ91D magnesium alloy surface. Journal of Materials Engineering, 2020, 48(8): 163-168.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000977      或      http://jme.biam.ac.cn/CN/Y2020/V48/I8/163
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