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低浓度硫酸铜对化学镀Ni-P镀层微观结构及性能的影响

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  • (郴州职业技术学院现代装备制造学院, 湖南 郴州 423000)
周柏玉(1987-),硕士,讲师,主要从事金属材料制备及性能研究,电话:15526282060,E-mail:313700212@qq.com

收稿日期: 2023-09-26

  修回日期: 2023-11-15

  录用日期: 2023-11-25

  网络出版日期: 2024-06-25

基金资助

湖南省教育厅科学研究项目(22B0946)

Effects of Low-Concentration Copper Sulfate on the Microstructure and Properties of Electroless Ni-P Coatings

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  • (Modern Equipment Manufacturing Institute, Chenzhou Vocational Technical College, Chenzhou 423000, China)
ZHOU Baiyu (1987-), Master, Instructor, Research Focus: Preparation and Properties of Metallic Materials, Tel.: 15526282060, E-mail: 313700212@qq.com

Received date: 2023-09-26

  Revised date: 2023-11-15

  Accepted date: 2023-11-25

  Online published: 2024-06-25

Supported by

Scientific Research Foundation of Education Bureau of Hunan Province (No.22B0946)

摘要

为改善镍磷(Ni-P)镀层的表面质量、提高Ni-P镀层的性能,在化学镀Ni-P镀液中加入少量的硫酸铜(CuSO4·5H2O)制备Ni-P镀层。利用扫描电镜、能谱仪、X射线衍射仪分析了镀层的表面形貌、成分和结构,研究了CuSO4·5H2O浓度对镀层的微观结构、表面粗糙度、光泽度、硬度、耐磨性和耐蚀性的影响。研究表明:当CuSO4·5H2O浓度为0.1 g/L时,镀层为致密的非晶态节瘤状组织,具有最佳的耐蚀性;当CuSO4·5H2O浓度为0.2 g/L时,镀层表面质量最好,硬度高、耐磨性优异,但镀层中出现少量微晶态Ni-Cu固溶体,耐蚀性下降;当CuSO4·5H2O浓度超过0.2 g/L后,镀层为混晶态菜花状组织,镀层表面的质量和耐蚀性随CuSO4·5H2O浓度的增加不断恶化。

本文引用格式

周柏玉, 黄仁超 . 低浓度硫酸铜对化学镀Ni-P镀层微观结构及性能的影响[J]. 材料保护, 2024 , 57(6) : 147 -153 . DOI: 10.16577/j.issn.1001-1560.2024.0138

Abstract

In order to improve the surface quality and properties of nickel-phosphorus(Ni-P) coatings, a small quantity of copper sulfate(CuSO4·5H2O) was added to the electroless Ni-P plating solution to prepare Ni-P coatings. The surface morphology, composition and structure of the coatings were analyzed using scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffractometer. The effects of CuSO4·5H2O concentration on the microstructure, surface roughness, glossiness, hardness, wear resistance and corrosion resistance of the coatings were investigated. Results showed that when the concentration of CuSO4·5H2O was 0.1 g/L, the coating exhibited a dense, amorphous nodular structure with the best corrosion resistance. At a concentration of 0.2 g/L, the coating had the best surface quality, high hardness and excellent wear resistance, but a small amount of microcrystalline Ni-Cu solid solution appeared in the coating, leading to decreased corrosion resistance. When the concentration of CuSO4·5H2O exceeded 0.2 g/L, the coating formed a mixed crystalline cauliflower-like structure, and both the surface quality and corrosion resistance of the coating deteriorated with increasing CuSO4·5H2O concentration.
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