Fig. 1. SEM micrographs of powder. (a) Ni60A powder; (b) CeO₂ powder

Fig. 2. Picture and principle diagram of laser cladding equipment. (a) Equipment picture; (b) principle diagram

Fig. 3. XRD diffraction patterns of Ni60A coating with different CeO₂ mass fractions of 0-4%

Fig. 4. Microstructures of the coating in the top, middle, and bottom regions with different CeO₂ mass fractions

Fig. 5. Enlarged diagrams of CeO₂/Ni60A coating with different CeO₂ mass fractions in the calibration areas of Fig. 4. (a) Ni60A; (b) 1% CeO₂/Ni60A; (c) 2% CeO₂/Ni60A; (d) 3% CeO₂/Ni60A

Fig. 6. EDS spectra of typical tissues in Fig. 5. (a) Region A; (b) region B; (c) region C; (d) region D

Fig. 7. Dynamic polarization curves of Ni60A coating with different CeO₂ mass fractions

Fig. 8. Nyquist curves and equivalent circuit diagram of different CeO₂/Ni60A coatings. (a) Nyquist curve; (b) equivalent circuit diagram

Fig. 9. Morphologies of different CeO₂/Ni60A coatings after electrochemical corrosion. (a) Ni60A; (b) 1% CeO₂ /Ni60A;(c) 2% CeO₂/Ni60A; (d) 3% CeO₂/Ni60A; (e) 4% CeO₂/Ni60A