Corrosion detection in steel bar: A time-frequency approach
Title
Corrosion detection in steel bar: A time-frequency approach
Subject
Corrosion monitoring
Guided wave ultrasonics
Longitudinal waves
Reinforcement bars
S-Transforms
Time-Frequency analysis
Description
This paper presents a new technique for discerning corrosion in steel bars using guided ultrasonic waves with an improved signal processing technique. A mild steel bar has been subjected to accelerated corrosion. Information concerning variation in spectral traits associated with the spread of corrosion has been discerned. Dispersion curves for the steel bar have been deduced to understand and correlate the observed change in time-frequency spectra with shift in predominant modes with spread of corrosion. Theoretical and measured mass loss in the steel rebar is used as physical parameters to evaluate corrosion. Tensile tests of corroded specimen have also been undertaken to measure the residual strength of the corroded bars. The superiority of the proposed signal processing technique in clearly discerning the state of corrosion has been demonstrated.
102150
107
Creator
Majhi, Subhra
Mukherjee, Abhijit
George, Nithin V.
Uy, Brian
Publisher
NDT & E International
Date
2019
Type
journalArticle
Identifier
0963-8695
10.1016/j.ndteint.2019.102150
Collection
Citation
Majhi, Subhra et al., “Corrosion detection in steel bar: A time-frequency approach,” Lamar University Midstream Center Research, accessed May 14, 2024, https://lumc.omeka.net/items/show/27578.