2020/01/11 by Indrani Mukherjee, Mukherjee, Indrani, Jinit Patil +5
Engineering · #Applied Physics (physics.app-ph) #Concrete Corrosion and Durability #FOS: Physical sciences #Geophysical Methods and Applications #Non-Destructive Testing Techniques #Ultrasonics and Acoustic Wave Propagation
paper · pdf · doi:10.48550/arxiv.2001.03756
openalex publication_date 2020/01/11 · openalex created_date 2022/10/04 · openalex updated_date 2026/07/28
Corrosion of steel bars in reinforced cement concrete (RCC) structures leads\nto premature deterioration and increase in life cycle maintenance costs.\nNon-destructive testing (NDT) of incipient corrosion has been an impending task\nin this domain. We present a low cost sensing platform based on eddy current\ndetection using anisotropic magnetoresistive (AMR) sensor to measure the extent\nof corrosion in steel reinforcing bars (rebars). The scheme employs\nphase-sensitive detection, wherein the phase shift in the sensor output\n(proportional to surface conductivity of the rebar) relative to the reference\nstimulus is measured by a lock-in amplifier and used to distinguish corroded\nand non-corroded rebars. The proof-of-concept sensor demonstration is able to\nresolve varying extents of rebar corrosion and can find potential applications\nas an NDT tool in a variety of industries.\n