The aim of this study is to improve the NdFeB (Ni–Cu–Ni) plating process by reducing the magneticshielding effect for the underlying Ni of the substrate and improving corrosion resistance. Two kinds ofcopper and Ni/P composite coatings on NdFeB magnets were successfully prepared with platingtechnology. Coating surface and cross-sectional morphologies were observed by scanning electronmicroscopy. Chemical composition of the coatings was studied through energy-dispersivespectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Corrosion resistances of thecopper coating and Ni/P coatings were evaluated by potentiodynamic polarization and electrochemicaltests, respectively. In the salt spray test, coatings exhibited good corrosion resistance ability. Results ofthe corrosion test in 3.5 wt.% sodium chloride solution, showed that the Cu–Ni/P composite coatingprovided excellent anti-corrosion performance for the magnets.
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