1：Experimental Design and Method Selection:

Laser cladding was performed using a pulsed Nd:YAG laser at different laser powers (150 W, 200 W, 250 W) with fixed scanning speed (2 mm/s), powder feeding rate (500 mg/s), and other parameters. Microstructural analysis was conducted using FE-SEM and XRD. Corrosion behavior was assessed via potentiodynamic polarization tests in 3.5% NaCl, 2% H2SO4, and 5% HCl solutions following ASTM-G61 standard.

2：5% NaCl, 2% H2SO4, and 5% HCl solutions following ASTM-G61 standard. Sample Selection and Data Sources:

2. Sample Selection and Data Sources: Ti-6Al-4V alloy was used as both substrate and cladding powder, with chemical composition verified by arc spark optical emission spectrometry. Powder morphology and size (90–125 μm) were characterized.

3：List of Experimental Equipment and Materials:

Equipment included a pulsed Nd:YAG laser device, FE-SEM (MIRA3 LMU, TESCAN), X-ray diffractometer (MPD-Xpert, Philips), and potentiostat (EG&G 273A). Materials included Ti-6Al-4V powder (Advanced Powders and Coatings Inc.), argon gas, Kroll's reagent for etching, and corrosive solutions (NaCl, H2SO4, HCl).

4：Experimental Procedures and Operational Workflow:

Laser cladding was performed with argon shielding and carrier gas. Samples were metallographically prepared, etched, and analyzed for microstructure and phases. Polarization tests started with OCP stabilization for 1000 s, scanning from -100 to +450 mV vs. OCP at 1 mV/s using a three-electrode setup (SCE reference, platinum auxiliary, working electrode with 2 cm2 area).

5：Data Analysis Methods:

Microstructural images and XRD patterns were analyzed to identify phases. Polarization curves were used to determine corrosion potential and current density, with comparisons made between samples and untreated alloy.