1：Experimental Design and Method Selection:

Laser cladding was used to prepare the Al0.5CoCrCuFeNi high-entropy alloy coating on AZ91D magnesium alloy. Optical microscopy (OM), scanning electron microscopy (SEM), and X-ray diffraction were employed to characterize the microstructure. Dry sliding wear and potentiodynamic polarization curve tests were conducted to evaluate wear and corrosion resistance.

2：5CoCrCuFeNi high-entropy alloy coating on AZ91D magnesium alloy. Optical microscopy (OM), scanning electron microscopy (SEM), and X-ray diffraction were employed to characterize the microstructure. Dry sliding wear and potentiodynamic polarization curve tests were conducted to evaluate wear and corrosion resistance. Sample Selection and Data Sources:

2. Sample Selection and Data Sources: AZ91D magnesium alloy samples were used as substrates. Mixed powders of Cu, Ni, Al, Co, Cr, and Fe were used for the coating.

3：List of Experimental Equipment and Materials:

CO2 high-power laser (TR050 type), ball milling equipment (DECO-PBM-V-0.4L), optical microscope (Axiovert 200MAT), scanning microscope (Quanta 400), X-ray diffractometer (X’ Pert PRO), microhardness tester (MICROMET 3), electronic analytical balance (Bartorius BS110).

4：4L), optical microscope (Axiovert 200MAT), scanning microscope (Quanta 400), X-ray diffractometer (X’ Pert PRO), microhardness tester (MICROMET 3), electronic analytical balance (Bartorius BS110). Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Mixed powders were ball-milled and preset on the AZ91D surface. Laser cladding was performed under argon protection. Microstructure characterization, wear, and corrosion tests followed.

5：Data Analysis Methods:

Microhardness was measured, wear weight loss was calculated, and corrosion resistance was evaluated based on polarization curves.