Nano mixed particles enhanced Nickel-Cobalt composite coatings by scanning jet electrodeposition

Jet electrodeposition has the characteristics of rapid deposition with high current density, but faces the problem of tip discharge, which causes a decrease in coating surface uniformity and flatness. In this paper, scanning jet electrodeposition was adopted to optimize the tip discharge. The differ...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part B, Journal of engineering manufacture Journal of engineering manufacture, 2024-01, Vol.238 (1-2), p.28-36
Main Authors: Jiang, Wei, Li, Huigui, Chen, Yuanlong, Fang, Cheng, Sheng, Liangcheng, Chen, Ya, Shen, Lida, Huang, Xiaoqing, Lao, Yuanxia
Format: Article
Language:English
Subjects:
Adhesion
Cellular structure
Cerium oxides
Cobalt
Corrosion currents
Corrosion resistance
Current density
Discharge
Electrodeposition
Mechanical properties
Microhardness
Morphology
Nickel base alloys
Particulate composites
Protective coatings
Substrates
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Summary:Jet electrodeposition has the characteristics of rapid deposition with high current density, but faces the problem of tip discharge, which causes a decrease in coating surface uniformity and flatness. In this paper, scanning jet electrodeposition was adopted to optimize the tip discharge. The different nanoparticles were mixed as the reinforcing phase of Ni-Co alloy coating. Nano-CeO2/Nip mixed particles enhanced Nickel-Cobalt composite coatings on 304 stainless steel by scanning jet electrodeposition. The morphologies, texture orientation, microhardness, coating adhesion, and corrosion resistance of Ni-Co-CeO2/Ni composite coatings were characterized. The addition of nano-mixed particles (CeO2/Nip) changed the morphology of Ni-Co-CeO2/Nip composite coating from large cellular protrusion structures to fine granular structures and improved the uniformity of the composite coating. Compared with Ni-Co alloy coating, the microhardness increased from 467.8 to 524.7 HV, the adhesion between the substrate and the coating increased from 20.6 to 28.9 N, and the corrosion current density decreased from 2.413 × 10−5 to 5.598 × 10−6 A·cm−2 in Ni-Co-CeO2/Nip (4 g/L) composite coating, indicating that nano-mixed particles (CeO2/Nip) improved the mechanical properties and corrosion resistance of Ni-Co alloy coating in scanning jet electrodeposition.
ISSN:0954-4054
2041-2975
DOI:10.1177/09544054231163359