MWM-Array Characterization of Mechanical Damage and Corrosion

There is an ongoing need to deliver reliable and practical solutions for high resolution imaging of mechanical damage and corrosion from outside a pipeline, with and without coatings removed. Coatings are used for corrosion protection, temperature regulation, and weight control; however, these coatings act as a barrier to inspection and often are removed for inspection with standard nondestructive evaluation (NDE) methods. Removal of coatings on pipelines is costly and time consuming, so having an accurate and rapid method to identify pipeline sections that should have coatings removed followed by high resolution damage characterization will provide substantial benefit to pipeline operators and improve safety of existing pipelines. This capability must be delivered in a practical, durable, easy to use system. The objective of this project was to advance the JENTEK meandering winding magnetometer (MWM)-Array technology to provide quantitative characterization of pipeline corrosion and mechanical damage as measured through coatings or insulation. Also of interest were higher resolution images produced with the coatings or insulation removed. For mechanical damage, quantitative characterization includes geometric variations and multidirectional residual stresses (near the surface and deeper within the pipeline). In addition, this program developed capability to detect cracks at damage sites. For corrosion, enhanced high resolution imaging of both external and internal corrosion was developed for specific applications to support life management decisions. The JENTEK team built on demonstrated MWM-Array and magnetoresistive (MR)-MWM-Array detection capabilities to deliver substantially enhanced characterization of damage and a practical means for implementation. This technology has been successfully applied in the aerospace and manufacturing industries and, compared to conventional NDE methods, provides substantially improved performance for imaging curved surface and buried damage through coatings.

  • Record URL:
  • Corporate Authors:

    JENTEK Sensors, Incorporated

    110-1 Clematis Avenue
    Waltham, MA  United States  02453

    Pipeline and Hazardous Materials Safety Administration

    U.S. Department of Transportation
    East Building, 2nd Floor 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Publication Date: 2015-5-13


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Photos; Tables;
  • Pagination: 150p

Subject/Index Terms

Filing Info

  • Accession Number: 01640872
  • Record Type: Publication
  • Contract Numbers: DTPH56-10-T-000009; DTPH56-10-BAA-000001
  • Files: TRIS, ATRI, USDOT
  • Created Date: Jul 10 2017 5:14PM