Fig. 1. Schematic diagram of distributed fiber corrosion measurement

Fig. 2. Diagram of steel pile and corrosion zone division

Fig. 3. Fiber wrapping device and sample fabrication pictures. (a) Fiber wrapping device; (b) sample A preparation; (c) sample B preparation

Fig. 4. System structure diagram

Fig. 5. Control curves for each experimental period. (a) Temperature control curve; (b) water level control curve

Fig. 6. Distributed optical fiber strain variation curves in the atmospheric zone with corrosion time

Fig. 7. Distributed optical fiber strain variation curves in the water level fluctuation zone with corrosion time

Fig. 8. Distributed optical fiber strain variation curves in the immersion zone

Fig. 9. Average strain curve in each corrosion zone. (a) Atmospheric zone; (b) upper half of fluctuation zone; (c) lower half of fluctuation zone; (d) immersion zone

Fig. 10. Mass loss and strain relationship diagrams. (a) Quality loss curves of each corrosion zone; (b) curve between average strain and mass loss in the fluctuation zone

Fig. 11. Strain color cloud maps of steel pile after different corrosion time