Fig. 1. Macroscopic morphologies of samples under different conditions.(a) Sample of original matrix; (b) rust sample; (c) sample of laser cleaning

Fig. 2. Corrosion test results of AH32 steel after cleaning at different laser energy densities. (a) Polarization curves; (b) electrochemical impedance spectroscopy

Fig. 3. Corrosion test results of AH32 steel after cleaning at different spot overlap rates. (a) Polarization curves; (b) electrochemical impedance spectroscopy

Fig. 4. Three-dimensional surface topographies of different samples. (a) Original sample, without electrochemical corrosion; (b) cleaned sample, without electrochemical corrosion; (c) original sample, with electrochemical corrosion; (d) cleaned sample, with electrochemical corrosion

Fig. 5. Microtopographies of samp after cleaning at different energy densities. (a) 15 J/cm²; (b) 20 J/cm²; (c) 25 J/cm²

Fig. 6. Micromorphologies of sample after cleaning at different spot overlap rates. (a) 40%; (b) 50%; (c) 60%