沟引宁,黄伟九,朱翊.镁合金表面化学镀 Ni-P 和 Ni-P-SiC 的对比[J].表面技术,2014,43(1):16-20,43
镁合金表面化学镀 Ni-P 和 Ni-P-SiC 的对比
Comparative Study of Electroless Ni-P and Ni-P-SiC on AZ91 D Magnesium Alloy
投稿时间:2013-08-05  修订日期:2013-10-14
DOI:
中文关键词:  镁合金  化学镀  Ni-P  Ni-P-SiC  耐蚀性  耐磨性
英文关键词:magnesium alloy  electroless plating  Ni-P  Ni-P-SiC  corrosion resistance  wear resistance
基金项目:重庆市教委科技研究项目( KJ070602)
作者单位
沟引宁 重庆理工大学 材料科学与工程学院, 重庆 400054 
黄伟九 重庆理工大学 材料科学与工程学院, 重庆 400054 
朱翊 重庆理工大学 材料科学与工程学院, 重庆 400054 
AuthorInstitution
GOU Yin-ning College of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China 
HUANG Wei-jiu College of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China 
ZHU Yi College of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China 
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中文摘要:
      目的 提高镁合金的耐磨性、耐蚀性,扩大其应用领域。 方法 采用“ 磷酸+钼酸铵酸洗寅HF 活化冶 的方法进行前处理,直接在 AZ91 D 镁合金表面化学镀 Ni-P 合金镀层和 Ni-P-SiC 复合镀层。 对两种镀层的表面和截面形貌、成分、结构、硬度、耐蚀性及耐磨性进行了系统比较。 结果 在 Ni-P 合金镀层中引入 SiC 粉末后,镀层的胞状颗粒细化,硬度提高至 643 HV,但其腐蚀电流密度有所增大。 结论 与 Ni-P合金镀层相比,Ni-P-SiC 复合镀层的耐蚀性有所下降,但耐磨性能大大提高。
英文摘要:
      Objective To improve the corrosion resistance and wear resistance of AZ91D magnesium alloy. Methods Ni-P-SiC composite coating and Ni-P coating were directly fabricated by electroless plating using phosphoric acid + ammonium molybdate pickling and HF activation. For comparison, electroless Ni-P coating was prepared at the same time. The morphology, composition, structure, hardness, corrosion resistance and wear resistance of the two coatings were compared systematically. Results The cellular grains of coating were refined by adding SiC powder. SiC phase appeared in the Ni-P-SiC composite coating without changing the basic structure of Ni-P alloy. The hardness of the Ni-P-SiC composite coating reached up to 643HV. The corrosion current density increased slightly in terms of the Ni-P alloy coating. Conclusion Compared with the Ni-P coating, the corrosion resistance of the Ni-P-SiC composite coating declined slightly, but its wear resistance increased greatly.
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