Fig. 1. (a) Surface topography drawing of oxide layer of the sample; (b) Surface topography drawing of coating of the sample; (c) Cross section

Fig. 2. (a) Test platform and (b) Schematic diagram of laser cleaning system

Fig. 3. (a) Schematic diagram of the first step laser cleaning path; (b) Schematic diagram of the second step laser cleaning path

Fig. 4. (a) Schematic diagram of spot overlap ratio; (b) Schematic diagram of path overlap ratio

Fig. 5. SEM of samples cleaned at different laser powers. (a) 30 W; (b) 35 W; (c) 40 W; (d) 45 W; (e) 50 W; (f) 60 W

Fig. 6. (a) The contents of Ti, Si, Mg and S in the sample after laser cleaning; (b) The contents of Al, O and C in the sample after laser cleaning

Fig. 7. Effect of laser on (a) oxide layer and (b) coating under the same process parameters; (c) Profile between two points ABin (b)

Fig. 8. Surface topography of the sample after laser cleaning. (a) 40 W; (b) 60 W; (c) 80 W; (d) 100 W

Fig. 9. Weight change of the same sample before and after each cleaning

Fig. 10. (a) SEM diagram and (b) EDS diagram of the sample after laser cleaning

Fig. 11. Mechanical properties of sample after laser cleaning and original sample. (a) Microhardness; (b) Stress-strain curves