Fig. 1. Schematic diagram of SECCM imaging system composition and platform

Fig. 2. SECCM scanning algorithm of single-barrel probe

Fig. 3. Detection model of microfluid driven based SECCM probe

Fig. 4. SECCM imaging and probe crack

Fig. 5. Positioning testing of micro-droplet SECCM probe under normal potential

Fig. 6. Cyclic voltammetry measurement results of carbon electrode material （8×8 pixels）

Fig. 7. Cyclic voltammetry curves of different measurement position

Fig. 8. Cyclic voltammetry measurement results of carbon electrode material

Fig. 9. Surface optical microscope images of aluminum alloy materials

Fig. 10. SECCM processing data for aluminum alloy surface measurement

Fig. 11. SECCM processing data for aluminum alloy surface measurement

Fig. 12. Extracted topography and electrochemical activity image from Fig.10 and Fig.11