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Structural Monitoring and Maintenance
  Volume 3, Number 3, September 2016 , pages 215-232

Quantitative corrosion imaging of pipelines using multi helical guided ultrasonic waves
Ehsan Dehghan-Niri and Salvatore Salamone

    This paper presents a multi helical ultrasonic imaging approach for quantitative corrosion damage monitoring of cylindrical structures. The approach consists of two stages. First a multi helical ultrasonic imaging (MHUI) algorithm is used to provide qualitative images of the structure of interest. Then, an optimization problem is solved in order to obtain quantitative damage information, such as thickness map. Experimental tests are carried out on a steel pipe instrumented with six piezoelectric transducers to validate the proposed approach. Three thickness recesses are considered to simulate corrosion damage. The results show the efficiency of the proposed approach for quantifying corrosion location, area and remnant thickness.
Key Words
    corrosion; guided waves; imaging algorithms
Ehsan Dehghan-Niri: Department of Civil, Structural and Environmental Engineering, University at Buffalo, USA
Salvatore Salamone: Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, 301 E Dean Keeton, C1748, Austin, TX, 78712, USA

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